To fight is a radical instinct; if men have nothing else to fight over they will fight over words, fancies, or women, or they will fight because they dislike each other's looks, or because they have met walking in opposite directions

I learned long ago, never to wrestle with a pig, you get dirty; and besides, the pig likes it.

I wouldn't say it's futile -- the opportunity is there. It's worthwhile to keep fighting to save the resources we have there.

The central processing system for injury, repair and fighting disease, infection and organ damage is now known to come from the bone marrow.

A string of excited, fugitive, miscellaneous pleasures is not happiness; happiness resides in imaginative reflection and judgment, when the picture of one's life, or of human life, as it truly has been or is, satisfies the will, and is gladly accepted.

The spirit's foe in man has not been simplicity, but sophistication.