For more than three thousand years men have quarreled concerning the formulas of their faith.

The past speaks to us in a thousand voices, warning and comforting, animating and stirring to action.

You do not build your own houses, nor make your own garments, nor bake your own bread, simply because you know that if you were to attempt all these things they would all be more or less ill done.

Ethical religion can be real only to those who are engaged in ceaseless efforts at moral improvement. By moving upward we acquire faith in an upward movement, without limit.

A planar geometrical figure with more than three vertices can be decomposed into a set of triangles, and it can be reconstructed from a set of triangles.

Ignorant men raise questions that wise men answered a thousand years ago.