Remember, you are not to prepare your defense beforehand, for I myself shall give you a wisdom in speaking that all your adversaries will be powerless to resist or refute.
Ever been taunted by those who do not share your faith? If such occasions find you maddeningly tongue-tied, try asking for the intercession of Catherine of Alexandria. She had the intellectual stamina to challenge the emperor himself about idol worship. He responded by sending fifty philosophers to talk her down. They failed; in fact, she converted all of them instead. Our goal is not to know what Catherine knew, but to believe as she believed.
-from the Loyola Press website