men, who, on account of their feeble mentality, are unable to grasp and to study the integral fittingness of things. They think that the whole universe is disarranged if something is displeasing to them, just because that thing is magnified in their perception. (3) The chief cause of this error is that man does not know himself. Now, for acquiring this self-knowledge, he needs a constant habit of withdrawing from things of the senses2 and of concentrating his thought within himself, and holding