Originally Posted by ck1986
that's if you delve into the meaning of the word "deen" in Islam which is often loosely translated as "religion" in the english language (and that word "religion" has been loaded and often taken out of context in the western hemisphere, the word "deen" is used to mean "way of life".
and the word Islam means to attain peace with God through submission to His Will and Authority.
Almighty God clearly tells us in the Quran:
Indeed, the religion in the sight of Allah is Islam.
And those who were given the Scripture did not differ except after knowledge had come to them
- out of jealous animosity between themselves.
And whoever disbelieves in the signs of Allah , then indeed, Allah is swift in [taking] account.
so we can see that submission to the will of God was the way of All the Prophets pbut - regardless of the directions given to them.
and yes, Adam pbuh also had that way of life and was under instruction to obey the commands - though man is created weak.
the commands would also be different from time to time and this makes perfect sense - i take it you know that marrying one's sister or brother is forbidden in Islam, but at one time, it was most likely allowed (twins or no twins) for the children of Adam to continue.
to say that God "changed His mind" would be sheer ignorance on the part of the one who assumes so, people's understanding and requirements in terms of universal etiquette changed until the sending of the final Messenger of God to mankind. he is mentioned as "the Prophet" or "that Prophet" in the old and new testaments.
so yes, the way of life has ALWAYS been the same - submit to the will of God, and attain peace from Him.