Both of the religions I was a member of taught about God and the Messiah, Father and Son. So that is the paridim I come from. In Genesis chapter 4 we read about Abel a son of Adam and Eve:
3 And in process of time it came to pass, that...Abel...brought of the firstlings of his flock and of the fat thereof. And the LORD had respect unto Abel and to his offering.
Though I had read it many times and I knew about Cain and Abel, God opened my eyes to this very important point. Where did Abel come up with the idea that God wanted him to offer the sacrifice of a lamb? Moses was not even born for another 2,500 years. Not only did he decide to offer this lamb as a burnt offering to God, but God accepted it and it was a blessing unto Abel. In Hebrews chapter 11 we read about God testifying of Abel's righteousness:
4 By faith Abel offered unto God a more excellent sacrifice than Cain, by which he obtained witness that he was righteous, God testifying of his gifts...
So how did Abel know what to do? Obviously Adam taught him, there were no preachers, there were not priests, no churches, in fact very few people around. Where did Adam learn what to do so he could teach his children? As God has shown me, he was taught by the divines before the fall, and he obviously remembered it. In fact I was led to an apocraphal book that discussed this event. "Conflict of Adam and Eve with Satan" also called “The First Book of Adam and Eve”
John clearly explains the meaning of the lamb in John 1:
29 Behold the Lamb of God, which taketh away the sin of the world.
So Adam was taught about the Messiah and was taught that the offering of a lamb was a type of the Messiah who would be slain to overcome death and sin, which was introduced into the world through Adam and Eve.
This is profound! Adam being instructed by God to teach his children that they may be redeemed through the sacrifice of the Messiah and to show our faith we must believe in the Messiah and remember his sacrifice. All this was taught by Adam because he was taught the Ancient Order by God in the Garden of Eden. More on this later.