Everybody knows the age-old story of Cain and Abel. I wouldn't say that they were the first rivalry between siblings but they certainly were not the best brothers. Cain and Abel were the sons of Adam and Eve the first people on the Earth. Cain and Abel every year offered what they had at the beginning of the harvest. This was a thing that happened every harvest and was a norm in the lives of Cain of Abel and in their family, but why did God not accept Cain's sacrifice and accepted Abel's?
In the Bible it describes only the one harvest and how it affects the lives Cain and Abel. Abel was a person that obviously loved god and gave God credit for his success and was very successful. In the Bible Abel gave the best of his new sheep to God and this was the blood sacrifice.
Cain gave a portion of his crops for his sacrifice. God accepted Abel's offering and rejected Cain's because it was not the absolute best or the first portion of the harvest. God had explained to Adam and Eve when they sinned that sin only be washed away by blood. God did not except a crop sacrifice because it simply wasn't blood.
God would not accept Cain's sacrifice because of his heart and his attitude. God didn't care more about what Cain brought but his mindset when he brought it. Cain's attitude was a key factor in displeasing God. His heart was not in the right place to make a sacrifice. This is seen when God warned Cain and said" You will be accepted if you do what is right. But if you refuse to do what is right, then watch out! Sin is crouching at the door, eager...