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

When I turn my mind’s eye upon myself, I understand that I am a thing which is incomplete and dependent on another and which aspires without limit to ever greater and better things…

Doubt is the origin of wisdom.

It is not enough to have a good mind; the main thing is to use it well.

I took especially great pleasure in mathematics because of the certainty and the evidence of its arguments.

Mind and soul of the man is entirely different from the body.

So far, I have been a spectator in this theatre which is the world, but I am now about to mount the stage, and I come forward masked.

With me, everything turns into mathematics.

In order to seek truth, it is necessary once in the course of our life to doubt, as far as possible, of all things

Except our own thoughts, there is nothing absolutely in our power.

I am accustomed to sleep and in my dreams to imagine the same things that lunatics imagine when awake.

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.

I think the way I do things would be difficult to teach somebody to do. They need to get another good used car dealer. That’s what they need. Find a good car dealer.

All the English speakers, or almost all, have difficulties with the gender of words.

I feel nothing, apart from a certain difficulty in continuing to exist.

You’re trying to escape from your difficulties, and there never is any escape from difficulties, never. They have to be faced and fought.

The human imagination… has great difficulty in living strictly within the confines of a materialist practice or philosophy.

It is what we need more than anything. It liberates us from pretense, humbles us out of our self-righteousness, and fortifies us for any difficulty life can throw at us.

What do we live for, if not to make life less difficult for each other?

My team and I have reunited two elements that coexist with difficulty: respect and affection, because when they love you they don’t respect you and when they respect you they don’t love you.