We do not describe the world we see, we see the world we can describe.

The reading of all good books is like a conversation with the finest minds of past centuries.

Even if I were to suppose that I was dreaming and whatever I saw or imagined was false, yet I could not deny that ideas were truly in my mind.

You just keep pushing. You just keep pushing. I made every mistake that could be made. But I just kept pushing.

The two operations of our understanding, intuition and deduction, on which alone we have said we must rely in the acquisition of knowledge.

Neither the true nor the false roots are always real; sometimes they are imaginary; that is, while we can always imagine as many roots for each equation as I have assigned, yet there is not always a definite quantity corresponding to each root we have imagined.

A state is better governed which has few laws, and those laws strictly observed.