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 when thou thinkest how sure and smooth in all its workings is the faculty of understanding and knowledge?

10. Things are in a sense so wrapped up in mystery that not a few philosophers, and they no ordinary ones, have concluded that they are wholly beyond our comprehension: nay, even the Stoics themselves find them hard to comprehend. Indeed every assent we give to the impressions of our senses is liable to error, for where is the man who never errs? Pass on then to the objective things themselves, how transitory they are, how worthless, the property, quite possibly, of a boy-minion, a harlot, or a brigand. After that turn to the characters of thine associates, even the most refined of whom it is difficult to put up with, let alone the fact that a man has enough to do to endure himself.

What then there can be amid such murk and nastiness, and in so ceaseless an ebbing of substance and of time, of movement and things moved, that deserves to be greatly valued or to excite our ambition in the least, I cannot even conceive. On the contrary, a man should take heart of grace to await his natural dissolution, and without any chafing at delay comfort himself with these twin thoughts alone: the one, that nothing will befall me that is not in accord with the Nature of the Universe; the other, that it is in my power to do nothing contrary to the God and the 'genius' within me. For no one can force me to disobey that.

11. To what use then am I putting my soul? Never fail to ask thyself this question and to cross-examine 111