It is not noble to think of yourself as a wretched, miserable sinner. Realizing this once is enough, until you hear the fantastic news that Jesus died for all your sins. Then, after this realization, you need to understand that your new position is one of righteousness. You are now pure, blameless and holy.
Becoming born again transfers you from darkness to light (Col 1:13), into a whole new dimension. In this dimension God sees you as He sees Christ, because of the amazing sacrifice He became. Can Christ be sinful, unholy or wretched? No! Remember that the one sacrifice was enough, you are now forever cleansed!
Walk in this mindset, and your life will change effortlessly. It will change from the inside out, not the other way around. It will come naturally.
“[The Father] has delivered and drawn us to Himself out of the control and the dominion of darkness and has transferred us into the kingdom of the Son of His love,” Col 1:13
“Yet now has [Christ, the Messiah] reconciled [you to God] in the body of His flesh through death, in order to present you holy and faultless and irreproachable in His [the Father’s] presence.” Col 1:22