Human reason goes forth inexorably to such questions as cannot be answered by any experiential use of reason or principles based on it. - Immanuel Kant

True politics cannot take a single step without first paying homage to morals, and while politics itself is a difficult art, its combination with morals is no art at all; for morals cuts the Gordian knot which politics cannot solve as soon as the two are in conflict.

The march of mathematics is pursued on a broad and magnificent highway, which the latest posterity shall frequent without fear of danger or impediment.

Man must be disciplined, for he is by nature raw and wild.