Albert Einstein:
How on earth are you ever going to explain in terms of chemistry and physics
so important a biological phenomenon as first love?
Robert A. Heinlein:
Women and cats will do as they please, and men and dogs should relax and get used to the idea.
Aristotle:
Anybody can become angry, that is easy; but to be angry with the right person, and to the right degree, and at the right time, and for the right purpose, and in the right way, that is not within everybody's power, that is not easy.
John Powell:
The only real mistake is the one from which we learn nothing.