Something in human nature causes us to start slacking off at our moment of greatest accomplishment. As you become successful, you will need a great deal of self-discipline not to lose your sense of balance, humility, and commitment.

They know that it is human nature to take up causes whereby a man may oppress his neighbor, no matter how unjustly... Hence they have had no trouble in finding men who would preach the damnability and heresy of the new doctrine from the very pulpit..

You don't really understand human nature unless you know why a child on a merry-go-round will wave at his parents every time around - and why his parents will always wave back.

They define something special in human nature. They give us a measure of what's possible and what's truly sensational or phenomenal.

All of us have a theory about human nature.

His works (taken together) are almost like a new edition of human nature.