The best road to correct reasoning is by physical science; the way to trace effects to causes is through physical science; the only corrective, therefore, of superstition is physical science.

You have heard of, and studied various systems of philosophy; but real philosophy is opposed to all systems.

The man possessed of a dollar, feels himself to be not merely one hundred cents richer, but also one hundred cents better, than the man who is penniless; so on through all the gradations of earthly possessions - the estimate of our own moral and political importance swelling always in a ratio exactly proportionate to the growth of our purse.

There is but one honest limit to the rights of a sentient being; it is where they touch the rights of another sentient being.

... we have broken down the self-respecting spirit of man with nursery tales and priestly threats, and we dare to assert, that inproportion as we have prostrated our understanding and degraded our nature, we have exhibited virtue, wisdom, and happiness, in our words, our actions, and our lives!

Pets, like their owners, tend to expand a little over the Christmas period.

We have ... dreamed so much and observed so little, that our imaginations have grown larger than the world we live in, and our judgments have dwindled down to a point.