God gave Christ as a sacrifice to pay for sins through the spilling of his blood. So God forgives the sins of those who have faith. God did all this to prove that he does what is right. He is a God of mercy. So he did not punish for their sins the people who lived before Jesus lived.
Before you believed in Christ, you were separated from him. You were not considered to be citizens of Israel. You were not included in what the covenants promised. You were without hope and without God in the world.
You have spent enough time in the past doing what ungodly people choose to do. You lived a wild life. You longed for evil things. You got drunk. You went to wild parties. You worshiped statues of gods, which the Lord hates.