Cain and Abel had the same parents so we can say that they had equal opportunities.
This verse explains the difference between the two: “If you do well, will you not be accepted? And if you do not do well, sin lies at the door. And its desire is for you, but you should rule over it.” (Genesis 4: 7)
Certainly, Abel did what was right. He lived in discipline and had faith to please God. In the verse above, God Himself – seeing that Cain was not well – tried to show him that his problem was within himself. Who knows, maybe Cain thought he was doing everything right, yet God was not pleased. It was useless for God to speak to Cain.
Likewise, there are many religious people who suffer with the same problem. They go to church in the belief that they are fulfilling their obligations, and strive to present themselves blameless. Nevertheless, the problem is within, where only God can see.
People hear the word and acknowledge that God was using the Pastor to speak to them, yet they leave the Church and continue to do the same thing or even worse, just like what happened with Cain: “Now Cain talked with Abel his brother; and it came to pass, when they were in the field, that Cain rose up against Abel his brother and killed him” (Genesis 4: 8).
Cain was the older brother and became angry because he considered himself wronged. Perhaps, this thought controlled his mind: “It’s not fair that God is treating Abel with favour! I’m the oldest. He’s being so inconsiderate. I deserve to be respected!”
Similarly, there are many older brothers in the Church, some of whom, instead of giving a good testimony and showing their younger brothers that they should live by faith, they are killing them with bad actions, words and decisions. In this way, they end up contaminating their younger brothers with the poison of religion.
Abel looked up to Cain because he was the older brother and, because of this, he was able to lure Abel to his field of envy, jealousy, disorder and death.
We have to be careful of whom we are dealing with, regardless of whether the person is the most experienced or the oldest. When their ideas are not according to the Word of God, be ignorant if necessary, but never leave the field of discipline, obedience and faith in the Word of God, because this can lead to death.