“For many a long day, monks, have you experienced the death of
mother, of son, of daughter, have you experienced the ruin of
relatives, of wealth, the calamity of disease. Greater is the flood
of tears shed by you crying and weeping over one and all of these,
as you fare on, run on this many a long day, united with the
disliked, separated from the liked, than are the waters in the four
oceas.
Why is that? Incalculable is the beginning, monks, of this faring
on, the faring on of beings covered by ignorance, fettered by
craving. Thus far enough is there, monks, for you to be repelled by
all the things of this world, enough to lose all passion for them,
enough to be liberated therefrom.”
Buddha, Samyutta Nikaya Sutta 15.3