Larry,
I beg to differ with you on the sacrifices.
1) The ground had just been cursed by God. Speaking to the serpent, God said; "...cursed are you - and upon your belly you shall go, and dust you shall eat all the days of your life." Hence, the
earth was now the lowly dwelling place of the serpent.
Then He proceeded to say to Adam; "...cursed is the
ground because of you -
thorns and thistles it shall bring forth to you." (3:17)
Keep in mind, at this point they are still in the Garden of Eden where everything was good. But outside the garden, the earth was to produce (thorns and thistles) and by the sin-cursed earth man's livelyhood was to come from it and, also to die and be buried in it.
After God cloathes them with "garments of [sheep]skins" they are banished from the Garden. (It probably was sheep skins because "Abel was a keeper of sheep." 4:2)
Then the first indication of a sacrifice to God is stated in Gen 4:3-4. First, "Cain brought to the Lord an offering of the fruit of the
ground," - that had been cursed and was now the dwelling place of the serpent.
Next,..."Abel brought of the
firstlings of his
flock and of their fat portions" of which God had regards for but not of Cains sin cursed earth offering. Hebrews 11:4 speaks of this by saying "By
faith Abel offered to God a more acceptable sacrifice than Cain,
through which he received
righteousness..." Abels heart was right with God, and because his heart was right with God, He offered what He knew was pleasing to God. Because Adam and Eve had received their "covering up of sins by a God's grace with garment of skins" as the picture, Abel had to have known through his parents instructions, obviously, what would and would not be an acceptable sacrifice. It was
notthat one was better that the other - that would be salvation by works. It was what he knew God expected of him.
*Just as an interesting thought, I find it strangely curious also that it was Christ that was crowned with thorns - which came out of the sin-cursed earth.
Therefore, Adam, Eve and Abel were the first to be saved by the grace of God through their faith!