Experiment is the sole source of truth.

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.

Don't settle for a normal life. Not when you can enjoy the wonderful weirdness of being who God created you to be.

It is better to be young in your failures than old in your successes.

A lover tries to stand in well with the pet dog of the house.

to hope was to expect

Every man in a bank hates what the bank does and yet the bank does it.

What is a weed? A plant whose virtues have not yet been discovered.[What is a sorrow? A feeling whose benefits have not yet been discovered]

Before a revolution happens, it is perceived as impossible; after it happens, it is seen as having been inevitable.

All the hands, hearts and minds of the individuals collectively contribute to the team's success. (listen to your team, watch their body language, share your expectations . . . work together.)

What is essential does not die but clarifies.

The only lost cause is one we give up on before we enter the struggle.