Many have argued that a vacuum does not exist, others claim it exists only with difficulty in spite of the repugnance of nature; I know of no one who claims it easily exists without any resistance from nature.

With these vast advantages, ordinary and extraordinary, one would have supposed the North would have been content, and would have at least respected the security and tranquility of such obedient and profitable brethren; but such is not human nature.

I think there's a supreme power behind the whole thing, an intelligence. Look at all of the instincts of nature, both animals and plants, the very ingenious ways they survive. If you cut yourself, you don't have to think about it.

How does a pansy, for example, select the ingredients from soil to get the right colors for the flower? Now there's a great miracle. I think there's a supreme power behind all of this. I see it in nature.

I guess they just took it for granted that that was what I was interested in and let nature take its course.

One of the first conditions of happiness is that the link between Man and Nature shall not be broken.

Our body is a machine for living. It is organized for that, it is its nature. Let life go on in it unhindered and let it defend itself.

Nature has different times.

I'm not sure I can explain the nature of Jack Kennedy's charm, but he took life just as it came.

Twilight - a time of pause when nature changes her guard. All living things would fade and die from too much light or too much dark, if twilight were not.

The wit makes fun of other persons; the satirist makes fun of the world; the humorist makes fun of himself, but in so doing, he identifies himself with people - that is, people everywhere, not for the purpose of taking them apart, but simply revealing their true nature.

Nowhere more truly than in his mental capacities is man a part of nature.

It will, of course, be understood that directly or indirectly, soon or late, every advance in the sciences of human nature will contribute to our success in controlling human nature and changing it to the advantage of the common weal.

Human beings are accustomed to think of intellect as the power of having and controlling ideas and of ability to learn as synonymous with ability to have ideas. But learning by having ideas is really one of the rare and isolated events in nature.

To the intelligent man with an interest in human nature it must often appear strange that so much of the energy of the scientific world has been spent on the study of the body and so little on the study of the mind.