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

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

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

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.

There is nothing so stable as change.

Evil when we are in its power is not felt as evil but as a necessity, or even a duty.

On the question of relating to our fellowman – our neighbor’s spiritual need transcends every commandment. Everything else we do is a means to an end. But love is an end already, since God is love.

The philosophy that I’ve embraced isn’t about sitting under a tree and studying my navel.

He who dies before he dies does not die when he dies.

Here’s the thing with me and the religious thing. This is the flat-out truth: I find the religiosity and philosophy in the music. I don’t find it anywhere else.

Even Castles made of sand, fall into the sea, eventually.

Science is a philosophy of discovery. Intelligent design is a philosophy of ignorance. You cannot build a program of discovery on the assumption that nobody is smart enough to figure out the answer to a problem.