"Let us imagine a pilot, and assume that he had passed every examination with distinction, but that he had not as yet been at sea. Imagine him in a storm; he knows everything he ought to do, but he has not known before how terror grips the seafarer when the stars are lost in the blackness of night; he has not know the sense of impotence that comes when the pilot sees the wheel in his hand become a plaything for the waves; he has not known how the blood rushes to the head when one tries to make calculations at such a moment; in short, he has had no conception of the change that takes place in the knower when he has to apply his knowledge."
Soren Kierkegaard, Thoughts on Crucial Situations in Human Life, pp. 35-36
Isn't this the story of the Christian life! We read; we hear, we sing, we say...but then the test comes. The moment when we are not looking at the situation from the outside, but from within. Then we say, "I know i ought...but..."
It is easy to examine someone else's life and actions and to see how they do not line up with their professed beliefs. It is easy to imagine that we have or would. But when we are tested, the situation is always different. We often respond in doubt and act antithetical to our beliefs.