Descartes constructed as noble a road of science, from the point at which he found geometry to that to which he carried it, as Newton himself did after him. ... He carried this spirit of geometry and invention into optics, which under him became a completely new art.

Martin in particular concluded that man was born to live either in the convulsions of misery, or in the lethargy of boredom.

The Holy Roman Empire is neither Holy, nor Roman, nor an Empire.

It has taken seas of blood to drown the idol of despotism, but the English do not think they bought their laws too dearly.

We are going to a new world... and no doubt it is there that everything is for the best; for it must be admitted that one might lament a little over the physical and moral happenings of our own world.

Every man can educate himself. It's shameful to put one's mind into the hands of those whom you wouldn't entrust with your money. Dare to think for yourself.

Liberty of thought is the life of the soul.