2 Corinthians 12:9 NIV
But he said to me, "My grace is sufficient for you, for my power is made perfect in weakness." Therefore I will boast all the more gladly about my weaknesses, so that Christ's power may rest on me.
“The other evening I was riding home after a heavy day's work. I felt wearied and sore depressed, when swiftly and suddenly that text came to me, ‘My grace is sufficient for thee.' I reached home and looked it up in the original, and at last it came to me in this way. ‘My grace is sufficient for THEE.' And I said, ‘I should think it is, Lord,' and I burst out laughing. I never understood what the holy laughter of Abraham was till then. It seemed to make unbelief so absurd...O brethren, be great believers . Little faith will bring your souls to heaven, but great faith will bring heaven to your souls.”
Charles H. Spurgeon
 William Williams, Personal Remembrances of Charles Haddon Spurgeon (London: Passmore and Alabaster, 1895), 25