To invent is to discern, to choose.

Point set topology is a disease from which the human race will soon recover.

It is by logic that we prove, but by intuition that we discover. To know how to criticize is good, to know how to create is better.

There are no solved problems; there are only problems that are more or less solved.

The scientist does not study nature because it is useful; he studies it because he delights in it, and he delights in it because it is beautiful.

Doubt everything or believe everything: these are two equally convenient strategies. With either we dispense with the need for reflection.

If nature were not beautiful, it would not be worth knowing, and if nature were not worth knowing, life would not be worth living

It is through science that we prove, but through intuition that we discover.

Geometry is the art of correct reasoning from incorrectly drawn figures.

One geometry cannot be more true than another; it can only be more convenient.

It is far better to foresee even without certainty than not to foresee at all.

Do something for somebody everyday for which you do not get paid.

I think at all social networks, be it Facebook or Twitter or whatever it is, there's an ecosystem that exist there. But there's also an ego system that exists there.

Observe all men, thyself most.

My doctors say the more I continue to push, the more I can continue to raise that bar, the better I can get.

I was looking through a newspaper and it was an audition for 'Kids Say the Darndest Things,' so I tried out. One thing led to another and I appeared on 'The Rosie O'Donnell Show' and 'Oprah.

I definitely invented the everything bagel. There's no doubt. It's undeniable truth. It's one of those things that's 100% true, 50% of the time.

Revolution always unfolds inside an atmosphere of rising expectations.

If men were in charge of carrying and birthing our babies, we'd have a lot fewer people on Earth, because we'd only do it once- I can promise you that!

Never a failure,always a lesson.

Man is still an ape in that he forgets what is not ever before his eyes.