“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.”

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.

I had become aware, as early as my college days, that no opinion, however absurd and incredible can be imagined, that has not been held by one of the philosophers.

To know what people really think, pay attention to what they do, rather than what they say.

Let whoever can do so deceive me, he will never bring it about that I am nothing, so long as I continue to think I am something.

Am I so tied to a body and senses that I am incapable of existing without them?

Each problem that I solved became a rule which served afterwards to solve other problems.

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

Masked, I advance.

There is nothing more ancient than the truth.

Gold and silver are no doubt subject to fluctuations, from the discovery of new and more abundant mines; but such discoveries are rare, and their effects, though powerful, are limited to periods of comparatively short duration.

I love playing it, I just never thought I’d make it to college, NBA, or be standing up here today. It is a surreal feeling. So many people doubted me and motivated me.

Doctor, you don’t know what it is to doubt everything, even yourself. No, you don’t; you couldn’t with eyebrows like yours.

So many people doubted me. They motivated me every single day, to be, who I am.

Whatever the misery, he could not regain contentment with a world which, once doubted, became absurd.

My job, my whole life, I’ve always had that kind of doubter, people have always doubted me. And I don’t know how I would succeed without it. So I welcome it, and it gives me a challenge, and I will see if I can live up to my challenge.

Dare to believe, and then dare to speak, and you shall have whatsoever you say if you doubt not.

Once doubt begins it spreads rapidly.