There must be room for the imagination to exercise its powers; we must conceive and apprehend a thousand things which we do not actually witness.

Invisible things are the only realities; invisible things alone are the things that shall remain.

One of the prerogatives by which man is eminently distinguished from all other living beings inhabiting this globe of earth, consists in the gift of reason.

Make men wise, and by that very operation you make them free. Civil liberty follows as a consequence of this; no usurped power can stand against the artillery of opinion.

Perfectibility is one of the most unequivocal characteristics of the human species.

Man is the only creature we know, that, when the term of his natural life is ended, leaves the memory of himself behind him.

The real or supposed rights of man are of two kinds, active and passive; the right in certain cases to do as we list; and the right we possess to the forbearance or assistance of other men. The first of these a just philosophy will probably induce us universally to explode.