Let me tell you how at one time the famous mathematician Euclid became a physician. It was during a vacation, which I spent in Prague as I most alway…

- Bernard Bolzano

My special pleasure in mathematics rested particularly on its purely speculative part.

- Bernard Bolzano

Even in the realm of things which do not claim actuality, and do not even claim possibility, there exist beyond dispute sets which are infinite.

- Bernard Bolzano