“I will put enmity between you and the woman, and between your offspring and her offspring; he shall bruise your head, and you shall bruise his heel.” – Genesis 3:15.” (ESV)
We spend each day considering verses from God’s Word which contain promises. He keeps all his promises. Today we look at a very important promise God made to the first two humans. Our verse spoken to Satan as a curse contains is the “first gospel” uttered. It came after Satan, inhabiting a serpent, lied to Eve who tripped and fell for the lie along with Adam into the first sin, the original sin. As a result, Adam and Eve have passed on to every human child born in their likeness. All humans are born in the same condition and under the curse of sin. ‘This “first gospel” is prophetic of the struggle and its outcome between “your seed” (Satan and unbelievers, who are called the Devil’s children in Jn 8:44) and her seed (Christ, a descendant of Eve, and those in Him), which began in the garden. In the midst of the curse passage, a message of hope shone forth—the woman’s offspring called “He” is Christ, who will one day defeat the Serpent. Satan could only “bruise” Christ’s heel (cause Him to suffer), while Christ will crush Satan’s head (destroy him with a fatal blow).‘
 John F. MacArthur Jr., The MacArthur Study Bible: New American Standard Bible., (Nashville, TN: Thomas Nelson Publishers, 2006), Ge 3:15.