5 This is the book of the generations of Adam. When God created man, he made him in the likeness of God. 2 Male and female he created them, and he blessed them and named them Man when they were created. 3 When Adam had lived 130 years, he fathered a son in his own likeness, after his image, and named him Seth.
The Holy Bible: English Standard Version. (2001). (Ge 5:1–3). Wheaton: Standard Bible Society.
When God created man, man was in God’s likeness. When man created man, man was in man’s likeness.
Because of the fall of man, were man to make his own savior, that savior would have Adam’s sin. So God needed a new Adam. He proclaimed in Genesis 3:15 that the new Adam would come from the woman’s seed, not Adam’s. Christ is in God’s own image because he is full God.
The first six chapters of Genesis cover roughly the first 2000 years of human history. From the flood to Christ is roughly another 2000 years. And at the beginning, God foreshadows his plan. When Isaiah said a virgin would give birth, all who had ears to hear understood. When God created man, he made him in his likeness and here again God would create a man fully in his image — the Imago Dei.