Reason may be the lever, but sentiment gives you the fulcrum and the place to stand on if you want to move the world.

Knowledge-it excites prejudices to call it science-is advancing as irresistibly, as majestically, as remorselessly as the ocean moves in upon the shore.

Where we stand is not as important as the direction in which we are moving.

From forty to fifty a man must move upward, or the natural falling off in the vigor of life will carry him rapidly downward.