Hello there my friend.
About your question: it is good and profitable for us if we
understand the different dispensations God has set for us man.
Failure to understand this will result in cofusion as to
comprehending the Bible.
For example:
Why has God prohited the Israelites here in eating certain kinds of
meat while in Genesis 1:29 we are told that they are to be
vegeterian only. No meat at all.
Ge 1:29 "And God said, "See, I have given you every
herb that yields seed which is on the face of all the earth, and
every tree whose fruit yields seed; to you it shall be for
food."
And then again in Genesis 9:1-7 we are again told that they can now
eat meat:
Ge 9:1 "So God blessed Noah and his sons, and said to them: "Be
fruitful and multiply, and fill the earth.
2 "And the fear of you and the dread of you shall be on every beast
of the earth, on every bird of the air, on all that move on the
earth, and on all the fish of the sea. They are given into your
hand.
3 "Every moving
thing that lives shall be food for you. I have given you all
things, even as the green herbs.
4 "But you shall not eat flesh with its life, that is, its
blood.
And then again in the Christian dispensation we are told:
1Ti 4:4 For every
creature of God is good, and nothing is to be refused if it is
received with thanksgiving;
This does not mean that God is fickle and unstable in His ways. It
means, however, that there is a divine program for the ages. Though
this is a very lengthy topic to tackle. Let it be enough though
that we are now living under the Church Age. And it's precepts
towards food is that one there in Timothy.
Like the command to build an ark was commanded to Noah only we are
not under these regulations about food and etc.
Heb 9:9 It was symbolic for the present time in which both gifts
and sacrifices are offered which cannot make him who performed the
service perfect in regard to the conscience--
10 concerned only with foods and drinks, various
washings, and fleshly ordinances imposed until the
time of reformation.
With regards to offerings:
we are not under the sacrificial offerings. WE no longer sacrifice
goats and lambs to a priest in this dispensation. Interestingly
however, in the dispensation of the coming Mellinium, the
sacrifices will be observed and practiced again as prophesied in
the Old TEstament.
With regards to taking another human beings life:
In Genesis prior to the flood God absolutely prohibits taking
another human beings life, but after the Flood, God allows capital
punishment under the governmental aurthority of man.
the point is this:
We are now in the Christian dispensation. And what God has set up
with regards to our rule of life in this dispensation we are under
duty to fulfill.