Prayer may be elevating if combined with work, and they who labor with head, hands or feet have faith and are generally quite sure of an immediate and favorable reply.

All my work has come about through a change in my earlier opinion of religion.

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.

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

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.

I see humanity now as one vast plant, needing for its highest fulfillment only love, the natural blessings of the great outdoors, and intelligent crossing and selection.

Science is the only savior.