Love is ...not a fact in nature of which we become aware, but rather a creation of the human imagination.

If only the fit survive and if the fitter they are the longer they survive, then Volvox must have demonstrated its superb fitness more conclusively than any higher animal ever has.

Though many have tried, no one has ever yet explained away the decisive fact that science, which can do so much, cannot decide what it ought to do.

Man is, perhaps, no more prone to war than he used to be and no more inclined to commit other evil deeds. But a given amount of ill will or folly will go further than it used to.

The advertiser is the overrewarded court jester and court pander at the democratic court.

We need some contact with the things we sprang from. We need nature at least as a part of the context of our lives. Without cities we cannot be civilized. Without nature, without wilderness even, we are compelled to renounce an important part of our heritage.

The flowers never waste their sweetness on the desert air or, for that matter, on the jungle air. In fact, they waste it only when nobody except a human being is there to smell it. It is for the bugs and a few birds, not for men, that they dye their petals or waft their scents.