Patriotism is the willingness to kill and be killed for trivial reasons.
Man needs, for his happiness, not only the enjoyment of this or that, but hope and enterprise and change.
Awareness of universals is called conceiving, and a universal of which we are aware is called a concept.
The infliction of cruelty with a good conscience is a delight to moralists. That is why they invented Hell.
Three passions, simple but overwhelmingly strong, have governed my life: the longing for love, the search for knowledge, and unbearable pity for the suffering of mankind.
The whole problem with the world is that fools and fanatics are always so certain of themselves, and wiser people so full of doubts.
To listen to some devout people, one would imagine that God never laughs.
Much that passes as idealism is disguised hatred or disguised love of power.
Religion is something left over from the infancy of our intelligence, it will fade away as we adopt reason and science as our guidelines.
Aristotle could have avoided the mistake of thinking that women have fewer teeth than men, by the simple device of asking Mrs. Aristotle to keep her mouth open while he counted.