The sacred rights of mankind are not to be rummaged for among old parchments or musty records. They are written as with a sunbeam in the whole volume of human nature by the hand of the divinity itself and can never be erased.

The most beautiful as well as the most ugly inclinations of man are not part of a fixed biologically given human nature but result from the social process which creates man.

I find it strange the way human nature wants heroes and yet wants to destroy their heroes. It's a kind of mass insecurity people want something to look up to and get a buzz off but at the same time want to destroy it because it makes them feel insecure.

When we think of the major threats to our national security the first to come to mind are nuclear proliferation rogue states and global terrorism. But another kind of threat lurks beyond our shores one from nature not humans - an avian flu pandemic.

The deepest principle in human nature is the craving to be appreciated.

What is tolerance? It is the consequence of humanity. We are all formed of frailty and error let us pardon reciprocally each other's folly - that is the first law of nature.

Nature is not human hearted.

All human actions have one or more of these seven causes: chance nature compulsions habit reason passion desire.

It stands to the everlasting credit of science that by acting on the human mind it has overcome man's insecurity before himself and before nature.

The sun the moon and the stars would have disappeared long ago... had they happened to be within the reach of predatory human hands.