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: and by it he being dead yet speaketh.’ –Hebrews 11:4
In Hebrews 11:4 it says how Abel made a better choice than Cain. Both Cain and Abel knew what should’ve been done and so Abel 
brought what God wanted where Cain did things his way and just brought some nice fruit. Cain also has GOD’s bad side because Cain denies he killed his brother so he lied to GOD even though GOD knows all and Cain was only thinking of himself.
Cain was so Jealous of Abel getting all the attention and being so good at everything and Jealous that GOD was with Abel and not him so Cain killed him then tried to hide it and not tell anyone. Cain buried Abel so there was no proof that he killed him. Cain thought no one would ever find out that he killed him, but GOD knew from the very beginning.
“Whosoever hateth his brother is a murderer: and ye know that no murderer hath eternal life abiding in him” (1 John 3: 15). Jesus taught against the common cause of murder, hate. Hear him: “But I say unto you, love your enemies, bless them that curse you, do good to them that hate you, and pray for them which despitefully use you and persecute you” (Matt. 5: 44). If Jesus’ teaching were universally obeyed, there would be no murder, covertly or overtly.
Murder is one of the worst acts a human can commit against another human being. One reason being there is no possible reparation. The Bible elevates and sanctifies human life, while humanism and organic evolution make man only another animal.
GOD tells us it is better for us to confess our sins instead of lying to everyone so we can be forgiven for what we have done. GOD will ALWAYS forgive us as long as we confess to what we’ve done. Cain would not confess so he lied to everyone INCLUDING GOD even though GOD knew from the beginning.
Abel was a keeper of sheep and Cain was a tiller of the ground. Keepers of sheep are always Peacekeepers, and a good shepherd looks out for the well-being of others. Cain was a tiller of the ground and he was also earthly.
