No peace and security among mankind-let alone common friendship-can ever exist as long as people think that governments get their authority from God and that religion is to be propagated by force of arms.

Our incomes are like our shoes; if too small, they gall and pinch us; but if too large, they cause us to stumble and to trip.

To give a man full knowledge of morality, I would send him to no other book than the New Testament.

Curiosity should be as carefully cherish'd in children, as other appetites suppress'd.

There cannot any one moral rule be proposed whereof a man may not justly demand a reason.

To ask at what time a man has first any ideas is to ask when he begins to perceive; having ideas and perception being the same thing.

That which is static and repetitive is boring. That which is dynamic and random is confusing. In between lies art.