#reason

Never let the future disturb you. You will meet it with the same weapons of reason which today arm you against the present.

It is the mark of an educated mind to be able to entertain a thought without accepting it.

He who has gained freedom by the faculty of reason may go where he wills and say: 'No one has power over me; I have been set free by God.'

It was in this way that Socrates became what he was, by paying attention to nothing other than reason in everything that he encountered.

Let not your mind be carried away by any sudden impression; but say, 'Wait for me a little, impression: let me see who you are, and whence you come; let me test you.'

Let us follow the argument wherever, like a wind, it may lead us.

An unconsidered opinion is like an untamed beast; only through rigorous cross-examination does it yield true understanding.

Do not value the applause of the crowd above the quiet verdict of reason.

I am not only now but always a man who obeys nothing in me except the reason that seems best to me upon reflection.

The greatest deception men suffer is from their own opinions when severed from the anchor of reason.

The good of man is a functioning of the soul in accordance with reason, or not without reason, and this functioning must be lifelong.

The best and most delightful thing for a man is to live in accordance with reason, for reason more than anything else is man.

Virtue is a state of character concerned with choice, lying in a mean relative to us, determined by rational principle.

Self-indulgence is justly censured, because it belongs to us not as human beings, but as animals.

Law is reason, free from passion.

A rule of thinking which would absolutely prevent me from acknowledging certain kinds of truth if those kinds of truth were really there, would be an irrational rule.

The head is always the dupe of the heart.

The intellect is always the dupe of the heart; when vanity whispers, reason obeys.

Intellect annuls Fate. So far as a man thinks, he is free.

The heart has its reasons of which reason knows nothing.

The untrained mind is like a wild beast.

A man who does not think for himself does not think at all.

Do not let future things disturb you, for you will come to them, if you shall at all, having the same reason which now you use on present things.

Do what is necessary, and whatever the reason of a social animal requires, and in the manner in which it requires.

He who fears death either fears the loss of sensation or a different kind of sensation. But if you have no sensation, neither will you have any harm.

Let reason be your guide, and peace will be your companion.