The most complete revenge is not to imitate the aggressor.

Think of all the years passed by in which you said to yourself "I'll do it tomorrow," and how the gods have again and again granted you periods of grace of which you have not availed yourself. It is time to realize that you are a member of the Universe, that you are born of Nature itself, and to know that a limit has been set to your time. Use every moment wisely, to perceive your inner refulgence, or 'twill be gone and nevermore within your reach.

Nature has given to each conscious being every power she possesses, and one of these abilities is this: just as Nature converts and alters every obstacle and opposition, and fits them into their predestined place, making them a part of herself, so too the rational person is able to finesse every obstacle into an opportunity, and to use it for whatever purpose it may suit.

It is the act of a madman to pursue impossibilities .

A man's true greatness lies in the consciousness of an honest purpose in life, founded on a just estimate of himself and everything else, on frequent self-examinations, and a steady obedience to the rule which he knows to be right, without troubling himself about what others may think or say, or whether they do or do not that which he thinks and says and does.

There is change in all things. You yourself are subject to continual change and some decay, and this is common to the entire universe.

Do not waste what remains of your life in speculating about your neighbors, unless with a view to some mutual benefit. To wonder what so-and-so is doing and why, or what he is saying, or thinking, or scheming -- in a word, anything that distracts you from fidelity to the ruler within you -- means a loss of opportunity for some other task.