Epictetus

“ For we must be satisfied, if we succeed in escaping at least a few faults by never relaxing our attention. 20But now, when you say, "To-morrow I will pay attention," I would have you know that this is what you are saying: "To-day I will be shameless, tactless, abject; it will be in the power of other men to grieve me; I will get angry to-day, I will give way to envy." Just see all the evils that you are allowing yourself! But if it is good for you to pay attention to-morrow, how much better is it to-day! ”

“ What are the things, then, to which I ought to pay attention?—First, these general principles, and you ought to have them at your command, and without them neither go to sleep, nor rise up, nor drink, nor eat, nor mingle with men; I mean the following: No man is master of another's moral purpose; and: In its sphere alone are to be found one's good and evil. ”

“ When you relax your attention for a little while, do not imagine that whenever you choose you will recover it, but bear this in mind, that because of the mistake which you have made to-day, your condition must necessarily be worse as regards everything else. For, to begin with—and this is the worst of all—a habit of not paying attention is developed; and after that a habit of deferring attention; and always you grow accustomed to putting off from one time to another tranquil and appropriate living, the life in accordance with nature, and persistence in that life. ”