Why God Did Not Respect Cain's Offering
Genesis 4:3–7 says God respected Abel and his offering but not Cain and his offering, yet it never gives the reason outright. The text turns our attention from the gift to the man, and to the anger that followed.
Why God Rejected Cain's Offering in Genesis 4
Genesis 4:3–7 never states outright why God rejected Cain's offering. What it does show is that the difference lay in the offerers as much as in what they brought, and that the rejection was a summons to do well rather than a final verdict.