Be careful how you think; your life is shaped by your thoughts. ~ Proverbs 4:23
How do you talk to yourself? Do you find that you criticize yourself too much? Is there a particular sin causing you to keep downing yourself?
God is telling us that if we want to change the way we live, we must change the way we think - and how we speak to ourselves comes from those thoughts.
Stop dwelling on the weaknesses. Quit beating yourself up with shame over a mistake you've made. God forgives, so you should forgive yourself and move on.
Stop with the negative self-talk. Instead, focus on who God wants you to be and how He wants you to live. Pray about it, talk about it, and live like a man with a second chance - and speak life into your own life.