What did God promise immediately after Adam sinned?
After Adam sinned, God immediately promised a Redeemer, the seed of the woman, who is the Christ. This Genesis 3:15 promise gave hope that creation, though subjected to the curse because of Adam's sin, would be delivered from corruption into the glorious liberty of the children of God.
Les explains that just as soon as Adam sinned in Genesis chapter 3, God came right back and promised in Genesis 3:15 a Redeemer, the seed of the woman, who is the Christ. He connects this promise to the passage where creation was made subject to vanity—the curse—not willingly, but because of Adam’s fault. The curse came in, yet God subjected creation in hope. The creation itself, not just the human race, shall be delivered from the bondage of corruption and the curse into the glorious liberty of the children of God. Les also notes that 'manifested' means being brought under the bright light of a magnifying situation, and all this will be manifested when we come into our place of glory.
And I will put enmity between thee and the woman, and between thy seed and her seed; it shall bruise thy head, and thou shalt bruise his heel.