“Virtue is what happens when someone has made a thousand small choices requiring effort and concentration to do something which is good and right, but which doesn’t come naturally. And then, on the thousand and first time, when it really matters, they find that they do what’s required automatically. Virtue is what happens when wise and courageous choices become second nature.” – N.T. Wright
I got the quote from an article in Christianity Today Magazine titled “Can You Control Yourself“. It was worth the read, and you might find it interesting, although it may take a subscription to read it.