The essence of mathematics lies in its freedom.

A false conclusion once arrived at and widely accepted is not easily dislodged and the less it is understood the more tenaciously it is held.

To ask the right question is harder than to answer it.

Great innovation only happens when people aren't afraid to do things differently.

In Mathematics the art of proposing a question must be held of higher value than solving it.

The essence of mathematics lies precisely in its freedom.

A set is a Many that allows itself to be thought of as a One.

Don't always blindly follow guidance and step-by-step instructions; you might run into something interesting.

In mathematics, the art of asking questions is more valuable than solving problems.

My beautiful proof lies all in ruins.

There is no doubt that we cannot do without variable quantities in the sense of the potential infinite. But from this very fact the necessity of the actual infinite can be demonstrated.

The history of our time must be well-captured and documented.

Without a possibility of change in meanings human communication could not perform its present functions.

I have to recognize that I am agnostic.

Pale death with an impartial foot knocks at the hovels of the poor and the palaces of king.

Last memory of my mother is her being dragged away

I can have different opinions with anybody. I can still be a friend with that person.

I hope to bring ancient philosophy and new scientific thinking together, to provide a new perspective of nature, especially the relationship between nature and man.

Not a single gun was used at the Oklahoma bombing.

I don't mind my work being a record of the time it was written in.

Being single isn't the cause of loneliness, and marriage is not necessarily the cure. There are many lonely married people as well.