Cain murders Abel out of jealousy.
“Then the Lord said to Cain, 'Where is Able your brother?' [Able] said, 'I do not know. Am I my brother's keeper?'”
Genesis 4:9
The main thing that strikes me about this passage is how stupid it is to try and lie to God. He knows everything, and yet I am sure there have been times when I have tried to brain wash Him into seeing the world my way. Pretty stupid. Don't even try to twist the truth when you are talking to the all-knowing.
