It is quite possible that he did not possess the qualities which just then pleased the pagan public in a rhetorician. The importance that the ancients attached to physical advantages in an orator is well known. Now, according to an old tradition, Augustin was a little man and not strong: till the end of his life he complained of his health. He had a weak voice, a delicate chest, and was often hoarse. Surely this injured him before audiences used to all the outward emphasis and all the studied graces of Roman eloquence. Finally, his written and spoken language had none of those brilliant and ingenious curiosities of phrase which pleased in literary and fashionable circles. This inexhaustibly prolific writer is not in the least a stylist. In this respect he is inferior to Apuleius, or Tertullian, though he leaves them far behind in the qualities of sincere and deep sentiment, poetic flow, colour, the vividness of metaphor, and, besides, the emotion, the suavity of the tone. With all that, no matter how hard he tried, he could never grasp what the rhetoricians of his time understood by style. This is why his writings, as well as his addresses, were not very much liked.
Nevertheless, good judges recognized his value, and guessed the powers, lying still unformed within him, which he was misusing ere they were mature. He was received at the house of the Proconsul Vindicianus, who liked to talk with him, and treated him with quite fatherly kindness. Augustin knew people in the best society. He did all his life. His charm and captivating manners made him welcome in the most exclusive circles. But just because he was valued by fashionable society, it came home to him more painfully that he had not the position he deserved with the public at large. Little by little his humour grew bitter. In this angry state of mind he was no longer able to consider things with the same confidence and serenity. His mental disquietudes took hold of him again.
His ideas were affected, first of all. He began to have doubts, more and more definite, about Manicheeism. He began by suspecting the rather theatrical austerity which the initiated of the sect made such a great parade of. Among other turpitudes, he saw one day in one of the busiest parts of Carthage "three of the Elect whinny after some women or other who were passing, and begin making such obscene signs that they surpassed the coarsest people for impudence and shamelessness." He was scandalized at that; but, after all, it was a small thing. He himself was not so very virtuous then. Generally your intellectual worries very little about squaring his conduct with his principles, and does not bother about the practical part. No; what was much worse in his eyes is that the Manichean physical science, a congeries of fables more or less symbolical, suddenly struck him as ruinous. He had just been studying astronomy, and he found that the cosmology of the Manichees--of these men who called themselves materialists--did not agree with scientific facts. Therefore Manicheeism must be wrong universally, since it ran counter to reason confirmed by experience.