If we then notice "a humble turn of mind" in ourselves, we immediately become smug—but that is pride in our humility. If we catch ourselves doing that we will be particularly impressed with how nuanced and subtle we have become. Humility is so shy. If you begin talking about it, it leaves. To even ask the question, "Am I humble?" is to not be so. Examining your own heart, even for pride, often leads to being proud about your diligence and circumspection.
Christian humility is not thinking less of yourself; it is thinking of yourself less, as C. S. Lewis so memorably said. It is to be no longer always noticing yourself and how you are doing and how you are being treated. It is "blessed self-forgetfulness."
Humility is a byproduct of belief in the gospel of Christ. In the gospel, we have a confidence not based in our performance but in the love of God in Christ (Rom. 3:22-24). This frees us from having to always be looking at ourselves. Our sin was so great, nothing less than the death of Jesus could save us. He had to die for us. But his love for us was so great, Jesus was glad to die for us.
~ Timothy Keller