A ray of imagination or of wisdom may enlighten the universe, and glow into remotest centuries.

The eye by long use comes to see even in the darkest cavern: and there is no subject so obscure but we may discern some glimpse of truth by long poring on it.

He who says there is no such thing as an honest man, you may be sure is himself a knave.

Did men but consider that the sun, moon, and stars, and every other object of the senses, are only so many sensations in their minds, which have no other existence but barely being perceived, doubtless they would never fall down and worship their own ideas; but rather address their homage to that eternal invisible Mind which produces and sustains all things.

Few men think, yet all will have opinions.

And what are these fluxions? The velocities of evanescent increments. And what are these same evanescent increments? They are neither finite quantities, nor quantities infinitely small, nor yet nothing. May we not call them the ghosts of departed quantities...?

Others indeed may talk, and write, and fight about liberty, and make an outward pretence to it but the free-thinker alone is truly free.