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

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.

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

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

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

Trying to build myself up with the fact that I have done things right that were even good and have had moments that were excellent but the bad is heavier to carry around and feel have no confidence.

One may miss the mark by aiming too high as too low.

You can say 'stop' or 'alto' or use any other word you think will work but I've found that a large bore muzzle pointed at someone's head is pretty much the universal language.

After a long, labored sigh, I said, “She was really happy when I got there. I’m pretty sure she was suicidal when I left.” “You do have that effect on people.

It's mostly Mars Bars and peanuts and cheese and you go to the fridge and there's Red Bull and Beer. It's not like people are holding me down and pouring beer in my face.

The examples of vice at home corrupt us more quickly and easily than others, since they steal into our minds under the highest authority.

I suppose "giving without expecting anything in return" isn't something new, but it always pushes your happy button when you do it or see it.

You are much happier when you are happy than when you ain't.

If you tell the truth you get into trouble, and that's why politicians are extremely dull.

He is a lyric poet . . . aloof from the swirling currents in which many of his colleagues are immersed.