"Welcome, Prince," said Aslan. "Do you feel yourself sufficient to take up the Kingship of Narnia?" "I - I don't think I do, Sir," said Caspian. "I'm only a kid." "Good," said Aslan. "If you had felt yourself sufficient, it would have been a proof that you were not."
"Prince Caspian" by C. S. Lewis, (Ch. 15), 1951.