Attaining Virtue

I am currently reading Mere Christianity by C.S. Lewis (The Chronicles of Narnia guy). I came across this passage and it is so powerful I just wanted to share.

After each failure, ask forgiveness, pick yourself up, and try again. Very often what God first helps us toward is not the virtue itself but just this power of always trying again…I cures our illusions about ourselves and teaches us to depend on God. We learn, on the one hand, that we cannot trust ourselves even in our best moments, and, on the other, that we need not despair even our worst, for our failures are forgiven. The only fatal thin is to sit down content with anything less than perfection.