Descartes was the first master of it and its great exponent.
[Illustration: Descartes at Amsterdam----316] Never was any mind more independent in voluntary submission to an inexorable logic.

Rene Descartes, who was born at La Haye, near Tours, in 1596, and died at Stockholm in 1650, escaped the influence of Richelieu by the isolation to which he condemned himself, as well as by the proud and somewhat uncouth independence of his character.

Engaging as a volunteer, at one and twenty, in the Dutch army, he marched over Germany in the service of several princes, returned to France, where he sold his property, travelled through the whole of Italy, and ended, in 1629, by settling himself in Holland, seeking everywhere solitude and room for his thoughts.

"In this great city of Amsterdam, where I am now," he wrote to Balzac, "and where there is not a soul, except myself, that does not follow some commercial pursuit, everybody is so attentive to his gains, that I might live there all my life without being noticed by anybody.

I go walking every day amidst the confusion of a great people with as much freedom and quiet as you could do in your forest-alleys, and I pay no more attention to the people who pass before my eyes than I should do to the trees that are in your forests and to the animals that feed there.