Having himself received Christianity as an intellectual system, he very specially addressed himself to the intellect of others. The door of the kingdom of heaven, it has been beautifully said, can only be opened from the inside; but to that observation this other may be added, that in a sense there are many doors, but each man can only open to others the one by which he has entered himself. Christianity had come to St. Paul as the truth about God and the world and himself. There was plenty of emotion besides; but the emotion for him came after the clear intellectual conviction and sprang out of it. And he expected that others would receive Christianity in the same way. Therefore he never spared the minds of those he addressed; he expected them to think; and he would have said that, if they would not open and exert their minds, they could not receive Christianity. I hardly know anything more puzzling than the audacity with which he cast himself on the minds of his hearers and trusted them to understand him, when he was thinking his strongest and his deepest. Imagine an epistle of his arriving in Rome or Ephesus, and read out in the audience of the church for the first time. Who were the hearers? The majority of them were slaves; many had till a short time before been unconcerned about religion; in all probability not a tithe of them could read or write. Yet what did Paul give them? Not milk for babes; not a compost of stories and practical remarks; but the Epistle to the Romans, with its strict logic and grand ideas, or the Epistle to the Ephesians, with its involved sentences and profound mysticism. He must have believed that they would understand what he wrote, though scholarship has considered it necessary to pile up a mountain of commentaries on these epistles. Christianity, as it went through the cities of the world in St. Paul's person, must have gone as a great intellectual awakening, which taught men to use their minds in investigating the profoundest problems of life. How deeply he was interested in the intellectual reception of the Gospel is shown by the earnestness with which he prays that his converts may excel in mental grasp of the truth. "I pray," he says, "that your love may abound yet more and more in knowledge and in all judgment." And again he says, "Making mention of you in my prayers, that the God of our Lord Jesus Christ, the Father of glory, may give unto you the spirit of wisdom and revelation in the knowledge of Him, the eyes of your understanding being enlightened," etc.