I love to make a mistake. It is my only assurance that I cannot reasonably be expected to assume the responsibility of omniscience.

I like to walk around Manhattan, catching glimpses of its wild life, the pigeons and cats and girls.

No man should tell a lie unless he is shrewd enough to recognize the time for renouncing it, if and when it comes, and knows how to renounce it gracefully.

There is only one object on earth that frightens me: a physicist working on a new trick.

A man may debar nonsense from his library of reason, but not from the arena of his impulses.

A guest is a jewel on the cushion of hospitality

I think one or two of the later Holmes stories are among the best.