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Human Nature

If you pick up a starving dog and make him prosperous, he will not bite you. This is the principal difference between a dog and a man.
Mark Twain, Pudd'nhead Wilson
I hope for nothing. I fear nothing. I am free.
Nikos Kazantzakis
There is scarcely a man sufficiently aware to know all the evil he does.
Duc De La Rochefoucauld, Reflexions ou Maximes Morales
Only two things are infinite, the universe and human stupidity, and I'm not sure about the former.
Albert Einstein
Man will occasionally stumble over the truth, but most of the time he will pick himself up and continue on.
Winston Churchill
The difference between stupidity and genius is that genius has its limits.
Albert Einstein
I believe I have found the missing link between animals and civilized man. It is us.
Konrad Lorenz
Many people would sooner die than think; In fact, they do so.
Bertrand Russell