Re:Verse reading–Genesis 4:1-16; 25-26 (day six) 

“If you do well, will you not be accepted? And if you do not do well, sin is crouching at the door. Its desire is contrary to you, but you must rule over it.” Genesis 4:7

The antidote to temptation is worship. Is that not what God is teaching Cain? What must Cain do well? It was not a matter of the physical offering, but rather a matter of the heart. “Cain, be careful. If your heart is not in the right place, then sin will be crouching at the door.” What God asks of Cain, he also asks of us, genuine delight in giving of our worship. And where there is sincere worship, there is no room for temptation. That is what God was teaching Cain…and us.