The optimism of a healthy mind is indefatigable.

It's easy enough to make the truth look silly. A man never seems more foolish-like than he does when he's speaking his whole mind and heart.

Outrage, combining as it does shock, anger, reproach, and helplessness, is perhaps the most unmanageable, the most demoralizing of all the emotions.

When Mr. William Faraday sat down to write his memoirs after fifty-eight years of blameless inactivity he found the work of inscribing the history of his life almost as tedious as living it had been, and so, possessing a natural invention coupled with a gift for locating the easier path, he began to prevaricate a little upon the second page, working his way up to downright lying on the sixth and subsequent folios.

A genuine coincidence always means bad luck for me; it's my only superstition.

Of all the band of personal traitors the sense of humor is the most dangerous.

There are, fortunately, very few people who can say that they have actually attended a murder.