As a sinner, I didn't have to struggle and strive to maintain my standing as a sinner. I was in Adam, and even when I did "good" things, my standing in Adam was maintained.
As a saint, I now don't have to struggle and strive to maintain my standing as a saint. I am in Christ, and even when I do "bad" things, my standing in Christ is maintained!
I was born in Adam.
Alive to sin, dead to God.
My very identity was a matter of sin and death.
I've been born again in Jesus.
Dead to sin, alive to God.
My very identity is a matter of righteousness and life!
Life in Christ isn't a matter of a bad person becoming a good person. It's a matter of a dead person becoming alive!