Mathematics is concerned only with the enumeration and comparison of relations.

It is not knowledge, but the act of learning, not possession but the act of getting there, which grants the greatest enjoyment.

Life stands before me like an eternal spring with new and brilliant clothes.

You know that I write slowly. This is chiefly because I am never satisfied until I have said as much as possible in a few words, and writing briefly takes far more time than writing at length.

Theory attracts practice as the magnet attracts iron.

You have no idea, how much poetry there is in the calculation of a table of logarithms!

There have been only three epoch-making mathematicians, Archimedes, Newton, and Eisenstein.

We must admit with humility that, while number is purely a product of our minds, space has a reality outside our minds, so that we cannot completely prescribe its properties a priori.

If others would but reflect on mathematical truths as deeply and as continuously as I have, they would make my discoveries.

Mathematicians stand on each other's shoulders.

I have had my results for a long time: but I do not yet know how I am to arrive at them.

Sometime your heart is the only thing worth listening to.

You are not a prisoner of your thoughts. You have the ability to control what you are thinking.

Men before you have quit smoking - you can too!

Integrity, or the lack of it, touches almost every facet of our lives-everything we say, every thought and desire.

He who works with the door open gets all kinds of interruptions, but he also occasionally gets clues as to what the world is and what might be important.

The simpler songs are just done when the lyric has been stated; the more complex or band-oriented stuff can go in a million directions.

Young fans want to know about the past and older fans also want to find new music.

In all cases where doubt crops up, ask yourself, "If I had a gun to my head and had to do it, how would I do it?" It's not as hard as you think.

On your daily journeys, listen to those inner signals that help you make the right choices no matter what anyone thinks.

The one thing about the music business is that there is no rulebook. It's not like the NFL or something where there's four downs to get ten yards or baseball where it's three strikes and you're out.