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.

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. None is perfect or inspired. As for their prophets, there are as many today as ever before, only now science refuses to let them overstep the bounds of common sense.

Of course it must, and our scientific men must be criticized boldly. They will not feel comfortable when you and I are through with them.

Science is the only savior.

Thinking is the greatest torture in the world for most people.

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.