But in my opinion, all things in nature occur mathematically.

I experienced in myself a certain capacity for judging which I have doubtless received from God, like all the other things that I possess; and as He could not desire to deceive me, it is clear that He has not given me a faculty that will lead me to err if I use it aright.

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.

Doubt is the origin of wisdom

The greatest minds are capable of the greatest vices as well as of the greatest virtues.

With me, everything turns into mathematics.

Travelling is almost like talking with those of other centuries.