In spite of it, he did not separate openly from the sect. He kept his rank of _auditor_ in the Manichee Church. What held him to it, were some plausible considerations on the intellectual side. Manicheeism, with its distinction of two Principles, accounted conveniently for the problem of evil and human responsibility. Neither God nor man was answerable for sin and pain, since it was the other, the Dark Principle, who distributed them through the world among men. Augustin, who continued to sin, continued likewise to be very comfortable with such a system of morals and metaphysics. Besides, he was not one of those convinced, downright minds who feel the need to quarrel noisily with what they take to be error. No one has opposed heresies more powerfully, and with a more tireless patience, than he has. But he always put some consideration into the business. He knew by experience how easy it is to fall into error, and he said this charitably to those whom he wished to persuade. There was nothing about him like St. Jerome.
Personal reasons, moreover, obliged him not to break with his fellow-religionists who had supported him, nursed him even, on his arrival at Rome, and who, as we shall see in a moment, might still do him services. Augustin was not, like his friend Alypius, a practical mind, but he had tact, and in spite of all the impulsiveness and mettle of his nature, a certain suppleness which enabled him to manoeuvre without too many collisions in the midst of the most embarrassing conjunctures. Through instinctive prudence he prolonged his indecision. Little by little, he who had formerly flung himself so enthusiastically in pursuit of Truth, glided into scepticism--the scepticism of the Academics in its usual form.
And at the same time that he lost his taste for speculative thinking, new annoyances in his profession put the finishing touch on his discouragement. If the Roman students were less noisy than those of Carthage, they had a deplorable habit of walking off and leaving their masters unpaid. Augustin was ere long victimized in this way: he lost his time and his words. As at Carthage, so at Rome, he had to face the fact that he could not live by his profession. What was he to do? Would he have to go back home? He had fallen into despair, when an unforeseen chance turned up for him.