Epictetus quotes - page 7
Think you to be a philosopher while acting as you do? think you to go on thus eating, thus drinking, giving way in like manner to [your own] wrath and to displeasure? Nay you must watch, you must labor; overcome certain desires; quit your familiar friends, submit to be despised by your slave, to be held in derision by them that meet you, to take the lower place in all things, in office, in positions of authority, in courts of law. Weight these things fully, and then, if you will, lay to your hand; if as the price of these things you would gain Freedom, Tranquility, and passionless Serenity.
Epictetus
The first and most necessary topic in philosophy is that of the use of moral theorems, such as, "We ought not to lie;" the second is that of demonstrations, such as, "What is the origin of our obligation not to lie;" the third gives strength and articulation to the other two, such as, "What is the origin of this is a demonstration." For what is demonstration? What is consequence? What contradiction? What truth? What falsehood? The third topic, then, is necessary on the account of the second, and the second on the account of the first. But the most necessary, and that whereon we ought to rest, is the first. But we act just on the contrary. For we spend all our time on the third topic, and employ all our diligence about that, and entirely neglect the first. (51).
Epictetus