It is not the strength of the body that counts, but the strength of the spirit.

To understand psychology, observe behavior in its natural context.

The biggest challenge isn't the science - it's changing people's perceptions.

In chemistry, as in life, sometimes you need to take a step back to see the bigger picture.

No arts; no letters; no society; and which is worst of all, continual fear, and danger of violent death; and the life of man, solitary, poor, nasty, brutish, and short.