To conquer oneself is a greater victory than to conquer thousands in battle.
The confirmed prejudices of a thoughtful life are as hard to change as the confirmed habits of an indolent life; and as some must trifle away age because they trifled away youth, others must labor on in a maze of error because they have wandered there too long to find their way out.
The trouble of the many and various aims of mortal men bring them much care, and herein they go forward by different paths but strive to reach one end, which is happiness. And that good is that, to which if any man attain, he can desire nothing further... Happiness is a state which is made perfect by the union of all good things. This end all men seek to reach, as I said, though by different paths. For there is implanted by nature in the minds of men a desire for the true good; but error leads them astray towards false goods by wrong paths.
Thought precedes the will to think, and error lives ere reason can be born. Reason, the power to guess at right and wrong, the twinkling lamp of wand'ring life, that winks and wakes by turns fooling the follower 'twixt shade and shining.
With endless patience you shall carry out your duty, and your firmness shall be tempered with tenderness for your people. Neither anger nor fury shall lodge in your mind, and all your words and actions shall be marked with calm deliberation. In all your deliberations in the Council, in your efforts at lawmaking, in all your official acts, self-interest shall be cast into oblivion. Cast not away the warnings of any others, if they should chide you for any error or wrong you may do, but return to the way of the Great Law, which is just and right. Look and listen for the welfare of the whole people and have always in view not only the present but also the coming generations, even those whose faces are yet beneath the surface of the earth - the unborn of the future Nation.
The more discussion the better, if passion and personality be eschewed; and discussion, even if stormy, often winnows truth from error - a good never to be expected in an uninquiring age.
So far as man stands for anything, and is productive or originative at all, his entire vital function may be said to have to deal with maybes. Not a victory is gained, not a deed of faithfulness or courage is done, except upon a maybe; not a service, not a sally of generosity, not a scientific exploration or experiment or textbook, that may not be a mistake. It is only by risking our persons from one hour to another that we live at all. And often enough our faith beforehand in an uncertified result is the only thing that makes the result come true.
Justice is immortal, eternal, and immutable, like God Himself; and the development of law is only then a progress when it is directed towards those principles which always like Him, are eternal; and whenever prejudice of error succeeds in establishing in customary law any doctrine contrary to eternal justice.
The unexamined life, said Socrates, is unfit to be lived by man. This is the virtue of liberty, and the ground on which we may justify our belief in it, that it tolerates error in order to serve truth.