For if the life of Adam had been taken before he and Eve bore children, there would have been no mankind. I like what this story teaches about the sanctity of human life. If only Adam's son Cain had learned such a lesson before he took the life of his brother. He was a hard worker and performed the tasks that God had given him. He also tried to blame someone else for his own shortcomings.
Human life is sacred.
When we sin, we should confess that sin to renew a right relationship with God. We also must realize that we cannot hide from God and that we must take responsibility for our actions. Eventually, with the help of his wife, Eve, Adam sinned by eating the forbidden fruit and was banned from the Garden of Eden. This is fitting, as Adam lived for 930 years. Eve was the mother of all humanity.