The world is like a board with holes in it, and the square men have got into the round holes, and the round into the square.

To be is to be perceived (Esse est percipi)." Or, "If a tree falls in the forest and no one is there to hear it, does it make a sound?

Few men think, yet all will have opinions.

We have first raised a dust and then complain we cannot see.

God is a being of transcendent and unlimited perfections: his nature therefore is incomprehensible to finite spirits.

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.

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...?