Paul's Christianity meant a radical change in his whole nature. He went out of Jerusalem a persecutor, he came into Damascus a Christian. He rode out of Jerusalem hating, loathing, despising Jesus Christ; he groped his way into Damascus, broken, bruised, clinging contrite to His feet, and clasping His Cross as his only hope. He went out proud, self-reliant, pluming himself upon his many prerogatives, his blue blood, his pure descent, his Rabbinical knowledge, his Pharisaical training, his external religious earnestness, his rigid morality; he rode into Damascus blind in the eyes, but seeing in the soul, and discerning that all these things were, as he says in his strong, vehement way, 'but dung' in comparison with his winning Christ. And his theory of conversion, which he preaches in all his Epistles, is but the generalisation of his own personal experience, which suddenly, and in a moment, smote his old self to shivers, and raised up a new life, with new tastes, views, tendencies, aspirations, with new allegiance to a new King. Such changes, so sudden, so revolutionary, cannot be expected often to take place amongst people who, like us, have been listening to Christian teaching all our lives. But unless there be this infusion of a new life into men's spirits which shall make them love and long and aspire after new things that once they did not care for, I know not why we should speak of them as being Christians at all. The transition is described by Paul as 'passing from death unto life.' That cannot be a surface thing. A change which needs a new name must be a profound change. Has our Christianity revolutionised our nature in any such fashion? It is easy to be a Christian after the superficial fashion which passes muster with so many of us. A verbal acknowledgment of belief in truths which we never think about, a purely external performance of acts of worship, a subscription or two winged by no sympathy, and a fairly respectable life beneath the cloak of which all evil may burrow undetected--make the Christianity of thousands. Paul's Christianity transformed him; does yours transform you? If it does not, are you quite sure that it _is_ Christianity at all? II. Then, again, we may take this change of name as being expressive of a life's work.