John the Baptist was regarded by some people as the Messiah but he told them: "I am not the one whom you think." He refused to accept the error of someone in order to derive glory from it.
John admitted what he was, declared what he was not, and humbled himself. He clearly recognized where his salvation came from, for he understood that he was the lamp, and he feared being extinguished by pride.
-- Sermon 293, 4
Prayer. Thanks and praise to you, my God, who sound in my ears and who illuminate my heart. Keep me away from every temptation.
-- Confessions 10, 31