A competent and self-confident person is incapable of jealousy in anything. Jealousy is invariably a symptom of neurotic insecurity.
Since when was an emotional argument won by logic
Progress isn`t made by early risers. It`s made by lazy men trying to find easier ways to do something.
"If you've got the truth you can demonstrate it. Talking doesn't prove it."
Sex without love is merely healthy exercise.
I am free because I know that I alone am morally responsible for everything I do.
The greatest productive force is human selfishness.
Never worry about theory as long as the machinery does what it's supposed to do
Women and cats will do as they please, and men and dogs should relax and get used to the idea.
The supreme irony of life is that hardly anyone gets out of it alive.
The human race divides itself politically into those who want to be controlled, and those who have no such desire
No statement should be believed because it is made by an authority.
One could write a history of science in reverse by assembling the solemn pronouncements of highest authority about what could not be done and could never happen.
One of the sanest, surest, and most generous joys of life comes from being happy over the good fortune of others.
Women will forgive anything. Otherwise, the race would have died out long ago.