This also applies to my good deeds

This also applies to my good deeds. How many of them were committed out of selfless motives, and how many out of fear of public opinion or a desire to show myself in a favorable light?

How much is of self-affirmation or a sense of superiority, which, under different circumstances, might just as well lead to bad deeds?

But I cannot, by my own moral effort, gain new impulses. After a few first steps in the Christian life, we begin to realize that everything that really needs to be changed in our souls can only be changed by God.

“Mere Christianity” C. S. Lewis