To me, the most obscene word in our language is celibacy.

Give me the storm and tempest of thought and action, rather than the dead calm of ignorance and faith! Banish me from Eden when you will; but first let me eat of the fruit of the tree of knowledge!

The intelligent and good man holds in his affections the good and true of every land -- the boundaries of countries are not the limitations of his sympathies. Caring nothing for race, or color, he loves those who speak other languages and worship other gods. Between him and those who suffer, there is no impassable gulf. He salutes the world, and extends the hand of friendship to the human race. He does not bow before a provincial and patriotic god -- one who protects his tribe or nation, and abhors the rest of mankind.

When a fact can be demonstrated, force is unnecessary; when it cannot be demonstrated, force is infamous.

Justice should remove the bandage from her eyes long enough to distinguish between the vicious and the unfortunate.

To the wise man, to the wise nation, the mistakes of the past are the torches of the present.

The man who does not do his own thinking is a slave, and is a traitor to himself and to his fellow-men.