“Masked, I advance.”

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.

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

Without competition we would be clinging to the clumsy antiquated processes of farming and manufacture and the methods of business of long ago, and the twentieth would be no further advanced than the eighteenth century.

In science the important thing is to modify and change one’s ideas as science advances.

Selfish interest is one of the most common obstructions to the advance of truth.

You just have to connect with people who believe in your vision and who will work with you and advance your cause.

Gratitude in advance is the most powerful creative force in the universe.

As technology advances at an alarming pace, the place of drawing remains as valid as ever in the creation of art and architecture.

I’m a preservationist, I believe in preserving history intact, but I also enjoy the technological advances which have been made.

You can’t say civilization don’t advance, in every war they kill you in a new way.