Habituated from our Infancy to trample upon the Rights of Human Nature, every generous, every liberal Sentiment, if not extinguished, is enfeebled in our Minds.
It is my deliberate opinion that the one essential requisite of human welfare in all ways is scientific knowledge of human nature.
What is government itself but the greatest of all reflections on human nature? If men were angels, no government would be necessary. If angels were to govern men, neither external nor internal controls on government would be necessary.
It's human nature to keep doing something as long as it's pleasurable and you can succeed at it - which is why the world population continues to double every 40 years.
Every so often, we pass laws repealing human nature.
What is called an acute knowledge of human nature is mostly nothing but the observer's own weaknesses reflected back from others.
The Greeks possessed a knowledge of human nature we seem hardly able to attain to without passing through the strengthening hibernation of a new barbarism.
Italians know about human nature - they understand human nature perhaps better than anyone else does. They know that people are weak and greedy and lazy and dishonest and they just try to make the best of it; to work around it.
Everything that looks to the future elevates human nature.
Squeeze human nature into the straitjacket of criminal justice and crime will appear.
There is a great deal of human nature in man.
Horrifying as it was to crack up in the public eye, it made me look at myself and fix it. People were exploitative; that's human nature.
A political convention is not a place where you can come away with any trace of faith in human nature.
It is not to be expected that human nature will change in a day.
There is an electric fire in human nature tending to purify - so that among these human creatures there is continually some birth of new heroism. The pity is that we must wonder at it, as we should at finding a pearl in rubbish.