If you violate Nature's laws you are your own prosecuting attorney, judge, jury, and hangman.

Science is knowledge arranged and classified according to truth, facts, and the general laws of nature.

If we had paid no more attention to our plants than we have to our children, we would now be living in a jungle of weed.

If you violate Nature's laws you are your own prosecuting attorney, judge, jury, and hangman.

In the span of my own lifetime I observed such wondrous progress in plant evolution that I look forward optimistically to a healthy, happy world as soon as its children are taught the principles of simple and rational living.

Less than fifteen per cent of the people do any original thinking on any subject. The greatest torture in the world for most people is to think.

As a scientist, I cannot help feeling that all religions are on a tottering foundation . . . I am an infidel today. I do not believe what had been served to me to believe. I am a doubter, a questioner, a skeptic. When it can be proved to me that there is immortality, that there is resurrection beyond the gates of death, then will I believe. Until then, no.