Obsolete misleading theologies bear the same relation to the essence of true religion that scarlet fever, mumps, and measles do to education.

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.

I have seen myself lose intolerance, narrowness, bigotry, complacence, pride and a whole bushel-basket of other intellectual vices through my contact with Nature and with men. And when you take weeds out of a garden it gives you room to grow flowers. So, every time I lost a little self-satisfaction, or arrogance, I could plant some broadness or love of my own in its place, and after a while the garden of my mind began to bloom and be fragrant and I found myself better equipped for my work and more useful to others as a consequence.

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.

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

Science is the only savior.