Not Understanding Grace to Understand It

One of our church members was talking to me in the hall today. He said, "You know, I just don't deserve the mercy that God gives me. His grace that He shows me is just beyond my understanding." His face showed seriousness. After hearing what he said, I said back to him, "You know, the fact that you say, you don't understand grace, makes me think that you do understand grace. You don't just say, 'Oh, yeah, He died for me and loves me,' and then move on." Seems paradoxical--to understand grace you must not understand grace.