Thermodynamics, correctly interpreted, does not just allow Darwinian evolution; it favors it.

If you are out to describe the truth, leave elegance to the tailor.

Bring forward what is true, Write it so that it is clear, Defend it to your last breath!

Nothing is more practical than a good theory.

Available energy is the main object at stake in the struggle for existence and the evolution of the world.

A mathematician will recognise Cauchy, Gauss, Jacobi or Helmholtz after reading a few pages, just as musicians recognise, from the first few bars, Mozart, Beethoven or Schubert.

The life contest is primarily a competition for available energy.

Which is more remarkable fact about America: that millionaires are idealists or idealists become millionaires.

In my view all salvation for philosophy may be expected to come from Darwin's theory

Bring forward what is true. Write it so that it is clear. Defend it to your last breath.

God is merciful to all, as he has been to you; he is first a father, then a judge.

The photographer must possess and preserve the receptive faculties of a child who looks at the world for the first time.

The difference between Hitler's speeches and Churchill's speeches was that Hitler made you think he could do anything; Churchill made you think you could do anything.

We only learn to behave ourselves in the presence of God.

A person becomes great not be sitting on some high seat, but through higher qualities. Can a crow become an eagle by simply sitting on the top of a palatial building?

I really love art and I always have in every single different form and I just hope that I'm able to give some art that will touch some people and help them to be more positive and stronger.

Keeping a sense of humor about life. My parents divorced when I was 8, and whenever I felt down, my mom would remind me that a sense of humor gets you through just about anything.

Boring people don't know they're boring. That's the problem with boring people.

As an athlete you're taught to be selfish. When I'm training, it's usually all about me.

We reap what we sow. We are the makers of our own fate. None else has the blame, none has the praise.