Intelligence, guided by kindness, is the highest wisdom. . . .

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!

An infinite God ought to be able to protect himself, without going in partnership with State Legislatures. Certainly he ought not so to act that laws become necessary to keep him from being laughed at. No one thinks of protecting Shakespeare from ridicule, by the threat of fine and imprisonment.

Heresy is a cradle; orthodoxy a coffin.

Prayer is of no avail. The lightning falls on the just and the unjust in accordance with natural laws.

An infinite personality is an infinite impossibility.

The triumph of justice is the only peace.