Genesis 3.15 is the first prophecy messianic. Talking to the serpent, God said: “I will put enmity between you and the woman, between your seed and her descendant. This one will injure your head and you will injure his heel”.

This text talks about two seeds, two descendants: the descendants of the woman, through whom Jesus would be born, to crush the head of the enemy; and the descendants of the serpent, in other words, the children of the devil.

From then on, the Biblical history presents these two genealogies that develop in parallel. We have its symbolic representation in chapter 4. Cain represents the malignant seed and Abel representing the blessed seed. Later we have the descents of Shem and Torah, Ishmael and Isaac, Jacob and Esau, etc. In the New Testament, John Baptist referred to the Pharisees as “race of vipers”. It was there “well” represented the descent of the old snake. In all the times we have children of God being persecuted by the sons of the Devil, until we come to Jesus and Judas Iscariots.

The children of God suffer some damage at some moment. The devil wounds their heel. After all, this is the only part of contact between both; therefore the enemy is underneath of our feet, having his head crushed (Rm.16.20).