This attitude [the abstract method in mathematics] can be encapsulated in the following slogan: a mathematical object is what it does.

It is obvious that mathematics needs both sorts of mathematicians, theory-builders and problem-solvers.

Although the prime numbers are rigidly determined, they somehow feel like experimental data.

... the atlas is a manifold. This is a typical mathematician's use of the word "is", and should not be confused with the normal use.

Here is something Category-Theorists like: it is trivial, but not trivially trivial.

What life gives us, good or bad, we seldom deserve.

Happy is the man who enjoy warmth of the sun and refresh in the breeze, who is secure within and say I have lived to-day.

When I religiously confess myself to myself I find that the best virtue I have has in it some tincture of vice.

The reason 'help' is such a great prayer is that God is the gift of desperation. When you're in despair, you're teachable.

In the hearts of witches, love and hate lie close together and often tumble over each other.

She [Hillary Clinton] wants to start an air war over Syria with Russia, a nuclear-armed power.

You would never know if you could ever be, If you never try, you would never see.

The paintings have a lot to do with the idea of seeing and doing, and the relationship between your hand and your eye, and the object.

Meditation means seeing God within you, and love is seeing God in the person next to you.

There is no amount of money in the world that will make you comfortable if you are not comfortable with yourself.