http://www.accesstoinsight.org/tipitaka/mn/mn.062.than.html
I have heard that on one occasion the Blessed One was staying at
Savatthi, in
Jeta's Grove, Anathapindika's Monastery. Then the Blessed
One, early in the morning, put on his robes and, carrying his bowl
and outer robe, went into Savatthi for alms. And Ven. Rahula, early
in the morning, put on his robes and, carrying his bowl and outer
robe, went into Savatthi for alms following right behind the
Blessed One.[1] Then the Blessed One, looking back
at Rahula, addressed him: "Rahula, any form whatsoever that is
past, future, or present; internal or external; blatant or subtle;
common or sublime; far or near: every form is to be seen as it
actually is with right discernment as: 'This is not mine. This is
not my self. This is not what I am.'"
"Just form, O Blessed One? Just form, O One Well-gone?"
"Form, Rahula, & feeling & perception & fabrications
& consciousness."
Then the thought occurred to Ven. Rahula, "Who, having been
exhorted face-to-face by the Blessed One, would go into the town
for alms today?" So he turned back and sat down at the foot of a
tree, folding his legs crosswise, holding his body erect, &
setting mindfulness to the fore.
Ven. Sariputta saw Ven. Rahula sitting at the foot of a tree,
his legs folded crosswise, his body held erect, & with
mindfulness set to the fore. On seeing him, he said to him,
"Rahula, develop the meditation[2] of mindfulness of in-&-out
breathing. The meditation of mindfulness of in-&-out breathing,
when developed & pursued, is of great fruit, of great
benefit."
Then Ven. Rahula, emerging from his seclusion in the late
afternoon, went to the Blessed One and, having bowed down, sat to
one side. As he was sitting there he said to him, "How, lord, is
mindfulness of in-&-out breathing to be developed & pursued
so as to be of great fruit, of great benefit?"
"Rahula, {any form whatsoever that is past, future, or present;
internal or external; blatant or subtle; common or sublime; far or
near: every form is to be seen as it actually is with right
discernment as: 'This is not mine. This is not my self. This is not
what I am.' There are these five properties, Rahula. Which five?
The earth property, the water property, the fire property, the wind
property, & the space property.
"And what is the earth property? The earth property can be
either internal or external. What is the internal earth
property?}[3] Anything internal, within oneself,
that's hard, solid, & sustained [by craving]: head hairs, body
hairs, nails, teeth, skin, flesh, tendons, bones, bone marrow,
kidneys, heart, liver, membranes, spleen, lungs, large intestines,
small intestines, contents of the stomach, feces, or anything else
internal, within oneself, that's hard, solid, and sustained: This
is called the internal earth property. Now both the internal earth
property & the external earth property are simply earth
property. And that should be seen as it actually is present with
right discernment: 'This is not mine, this is not me, this is not
my self.' When one sees it thus as it actually is present with
right discernment, one becomes disenchanted with the earth property
and makes the earth property fade from the mind.
"And what is the water property? The water property may be
either internal or external. What is the internal water property?
Anything internal, belonging to oneself, that's water, watery,
& sustained: bile, phlegm, pus, blood, sweat, fat, tears, oil,
saliva, mucus, oil-of-the-joints, urine, or anything else internal,
within oneself, that's water, watery, & sustained: This is
called the internal water property. Now both the internal water
property & the external water property are simply water
property. And that should be seen as it actually is present with
right discernment: 'This is not mine, this is not me, this is not
my self.' When one sees it thus as it actually is present with
right discernment, one becomes disenchanted with the water property
and makes the water property fade from the mind.
"And what is the fire property? The fire property may be either
internal or external. What is the internal fire property? Anything
internal, belonging to oneself, that's fire, fiery, &
sustained: that by which [the body] is warmed, aged, & consumed
with fever; and that by which what is eaten, drunk, chewed, &
savored gets properly digested; or anything else internal, within
oneself, that's fire, fiery, & sustained: This is called the
internal fire property. Now both the internal fire property &
the external fire property are simply fire property. And that
should be seen as it actually is present with right discernment:
'This is not mine, this is not me, this is not my self.' When one
sees it thus as it actually is present with right discernment, one
becomes disenchanted with the fire property and makes the fire
property fade from the mind.
"And what is the wind property? The wind property may be either
internal or external. What is the internal wind property? Anything
internal, belonging to oneself, that's wind, windy, &
sustained: up-going winds, down-going winds, winds in the stomach,
winds in the intestines, winds that course through the body,
in-and-out breathing, or anything else internal, within oneself,
that's wind, windy, & sustained: This is called the internal
wind property. Now both the internal wind property & the
external wind property are simply wind property. And that should be
seen as it actually is present with right discernment: 'This is not
mine, this is not me, this is not my self.' When one sees it thus
as it actually is present with right discernment, one becomes
disenchanted with the wind property and makes the wind property
fade from the mind.
"And what is the space property? The space property may be
either internal or external. What is the internal space property?
Anything internal, belonging to oneself, that's space, spatial,
& sustained: the holes of the ears, the nostrils, the mouth,
the [passage] whereby what is eaten, drunk, consumed, & tasted
gets swallowed, and where it collects, and whereby it is excreted
from below, or anything else internal, within oneself, that's
space, spatial, & sustained: This is called the internal space
property. Now both the internal space property & the external
space property are simply space property. And that should be seen
as it actually is present with right discernment: 'This is not
mine, this is not me, this is not my self.' When one sees it thus
as it actually is present with right discernment, one becomes
disenchanted with the space property and makes the space property
fade from the mind.
"Rahula, develop the meditation in tune with earth. For when you
are developing the meditation in tune with earth, agreeable &
disagreeable sensory impressions that have arisen will not stay in
charge of your mind. Just as when people throw what is clean or
unclean on the earth — feces, urine, saliva, pus, or blood — the
earth is not horrified, humiliated, or disgusted by it; in the same
way, when you are developing the meditation in tune with earth,
agreeable & disagreeable sensory impressions that have arisen
will not stay in charge of your mind.
"Develop the meditation in tune with water. For when you are
developing the meditation in tune with water, agreeable &
disagreeable sensory impressions that have arisen will not stay in
charge of your mind. Just as when people wash what is clean or
unclean in water — feces, urine, saliva, pus, or blood — the water
is not horrified, humiliated, or disgusted by it; in the same way,
when you are developing the meditation in tune with water,
agreeable & disagreeable sensory impressions that have arisen
will not stay in charge of your mind.
"Develop the meditation in tune with fire. For when you are
developing the meditation in tune with fire, agreeable &
disagreeable sensory impressions that have arisen will not stay in
charge of your mind. Just as when fire burns what is clean or
unclean — feces, urine, saliva, pus, or blood — it is not
horrified, humiliated, or disgusted by it; in the same way, when
you are developing the meditation in tune with fire, agreeable
& disagreeable sensory impressions that have arisen will not
stay in charge of your mind.
"Develop the meditation in tune with wind. For when you are
developing the meditation in tune with wind, agreeable &
disagreeable sensory impressions that have arisen will not stay in
charge of your mind. Just as when wind blows what is clean or
unclean — feces, urine, saliva, pus, or blood — it is not
horrified, humiliated, or disgusted by it; in the same way, when
you are developing the meditation in tune with wind, agreeable
& disagreeable sensory impressions that have arisen will not
stay in charge of your mind.
"Develop the meditation in tune with space. For when you are
developing the meditation in tune with space, agreeable &
disagreeable sensory impressions that have arisen will not stay in
charge of your mind. Just as space is not established anywhere, in
the same way, when you are developing the meditation in tune with
space, agreeable & disagreeable sensory impressions that have
arisen will not stay in charge of your mind.
"Develop the meditation of good will. For when you are
developing the meditation of good will, ill-will will be
abandoned.
"Develop the meditation of compassion. For when you are
developing the meditation of compassion, cruelty will be
abandoned.
"Develop the meditation of appreciation. For when you are
developing the meditation of appreciation, resentment will be
abandoned.
"Develop the meditation of equanimity. For when you are
developing the meditation of equanimity, irritation will be
abandoned.
"Develop the meditation of the unattractive. For when you are
developing the meditation of the unattractive, passion will be
abandoned.
"Develop the meditation of the perception of inconstancy. For
when you are developing the meditation of the perception of
inconstancy, the conceit 'I am' will be abandoned.
"Develop the meditation of mindfulness of in-&-out
breathing. Mindfulness of in-&-out breathing, when developed
& pursued, is of great fruit, of great benefit.
"And how, Rahula, is mindfulness of in-&-out breathing
developed & pursued so as to be of great fruit, of great
benefit?
"There is the case where a monk, having gone to the wilderness,
to the shade of a tree, or to an empty building, sits down folding
his legs crosswise, holding his body erect, and setting mindfulness
to the fore.[4] Always mindful, he breathes in;
mindful he breathes out.
"[1] Breathing in long, he discerns, 'I am breathing in long';
or breathing out long, he discerns, 'I am breathing out long.' [2]
Or breathing in short, he discerns, 'I am breathing in short'; or
breathing out short, he discerns, 'I am breathing out short.' [3]
He trains himself, 'I will breathe in sensitive to the entire
body.' He trains himself, 'I will breathe out sensitive to the
entire body.' [4] He trains himself, 'I will breathe in calming
bodily fabrication.' He trains himself, 'I will breathe out calming
bodily fabrication.'
"[5] He trains himself, 'I will breathe in sensitive to
rapture.' He trains himself, 'I will breathe out sensitive to
rapture.' [6] He trains himself, 'I will breathe in sensitive to
pleasure.' He trains himself, 'I will breathe out sensitive to
pleasure.' [7] He trains himself, 'I will breathe in sensitive to
mental fabrication.' He trains himself, 'I will breathe out
sensitive to mental fabrication.' [8] He trains himself, 'I will
breathe in calming mental fabrication.' He trains himself, 'I will
breathe out calming mental fabrication.'
"[9] He trains himself, 'I will breathe in sensitive to the
mind.' He trains himself, 'I will breathe out sensitive to the
mind.' [10] He trains himself, 'I will breathe in satisfying the
mind.' He trains himself, 'I will breathe out satisfying the mind.'
[11] He trains himself, 'I will breathe in steadying the mind.' He
trains himself, 'I will breathe out steadying the mind.' [12] He
trains himself, 'I will breathe in releasing the mind.' He trains
himself, 'I will breathe out releasing the mind.'
"[13] He trains himself, 'I will breathe in focusing on
inconstancy.' He trains himself, 'I will breathe out focusing on
inconstancy.' [14] He trains himself, 'I will breathe in focusing
on dispassion.'[5] He trains himself, 'I will breathe
out focusing on dispassion.' [15] He trains himself, 'I will
breathe in focusing on cessation.' He trains himself, 'I will
breathe out focusing on cessation.' [16] He trains himself, 'I will
breathe in focusing on relinquishment.' He trains himself, 'I will
breathe out focusing on relinquishment.'
"This, Rahula, is how mindfulness of in-&-out breathing is
developed & pursued so as to be of great fruit, of great
benefit.
"When mindfulness of in-&-out breathing is developed &
pursued in this way, even one's final in-breaths & out-breaths
are known as they cease, not unknown."[6]
That is what the Blessed One said. Gratified, Ven. Rahula
delighted in the Blessed One's words.