If you have an hour, will you not improve that hour, instead of idling it away? - Philip Dormer Stanhope

The world can doubtless never be well known by theory: practice is absolutely necessary.

I am convinced that a light supper, a good night's sleep, and a fine morning, have sometimes made a hero of the same man, who, by an indigestion, a restless night, and rainy morning, would have proved a coward.

Listen to everything that is said, and see everything that is done. Observe the looks and countenances of those who speak, which is often a surer way of discovering the truth than from what they say. But then keep all those observations to yourself, for your own private use, and rarely communicate them to others. Observe, without being thought an observer, for otherwise people will be upon their guard before you.