Don't struggle in self-effort to be better. Don't determine that you are going to 'try harder.' Acknowledge your need of His all-sufficient grace and go forward, surrendering and trusting in the power of God's transforming grace. 'As you therefore have received Christ Jesus the Lord, so walk in Him' (Col. 2:6). You were saved by faith; therefore, you are to walk in faith. It may be one step at a time, but walk. You can say, 'I can't,' as long as in the next breath you say, 'But God, You can.'
I just LOVE that!!