But all at once I realized that it was not my success God had used to enable me to help those in this prison, or in hundreds of others just like it. My life of success was not what made this morning so glorious -- all my achievements meant nothing in God's economy. "No, the real legacy of my life was my biggest failure -- that I was an ex-convict. My greatest humiliation -- being sent to prison -- was the beginning of God's greatest use of my life; He chose the one thing in which I could not glory for His glory.
Charles Colson (1997). “Loving God”, p.24, Zondervan