Superstition, then, is engendered, preserved, and fostered by fear.

The more intelligible a thing is, the more easily it is retained in the memory, and counterwise, the less intelligible it is, the more easily we forget it.

All is One (Nature, God)

In the state of nature, wrong-doing is impossible ; or, if anyone does wrong, it is to himself, not to another.

To give aid to every poor man is far beyond the reach and power of every man. Care of the poor is incumbent on society as a whole.

We can always get along better by reason and love of truth than by worry of conscience and remorse...we should strive to keep worry from our life.

I shall consider human actions and desires in exactly the same manner, as though I were concerned with lines, planes and solids.