“The first precept was never to accept a thing as true until I knew it as such without a single doubt”

In order to improve the mind, we ought less to learn than to contemplate.

I think; therefore I am.

To live without philosophizing is in truth the same as keeping the eyes closed without attempting to open them.

If you would be a real seeker after truth, it is necessary that at least once in your life you doubt, as far as possible, all things.

Bad books engender bad habits, but bad habits engender good books.

Whenever anyone has offended me, I try to raise my soul so high that the offense cannot reach it.

Nothing is made from nothing.

To think? That’s it. It is thought. This alone cannot be detached from me. I am, I exist; that is certain.

Divide each difficulty into as many parts as is feasible and necessary to resolve it.

To live well is to live concealed.

It is best not to go on for great quest for truth , it will only make you miserable

The dreams we imagine when we are asleep should not in any way make us doubt the truth of the thoughts we have when we are awake.

The destruction of the foundations necessarily brings down the whole edifice.

For to be possessed of a vigorous mind is not enough; the prime requisite is rightly to apply it.

For the very fact that my knowledge is increasing little by little is the most certain argument for its imperfection.

At last I will devote myself sincerely and without reservation to the general demolition of my opinions.

Truth, however bitter, can be accepted, and woven into a design for living.

Be in love with your life, every detail of it.

What interests me is the surprising enormous extent to which most people accept the fate that’s been given to them, and find some dignity.

When people told the audience that [Sam Kinison] was good, he was accepted after that.

Everybody had to be thoroughly understood before being accepted.

One must accept the fact that we have only one companion in this world, a companion who accompanies us from the cradle to the grave – our own self. Get on good terms with that companion – learn to live with yourself.

He who accepts his poverty unhurt I’d say is rich although he lacked a shirt. But truly poor are they who whine and fret and covet what they cannot hope to get.

Feminine intuition? Is that what you wanted the robot for? You men. Faced with a woman reaching a correct conclusion and unable to accept the fact that she is your equal or superior in intelligence, you invent something called feminine intuition.