Excellent!" I cried. "Elementary," said he.

Everything I have to say has already crossed your mind." "Then possibly my answer has crossed yours.

Before turning to those moral and mental aspects of the matter which present the greatest difficulties, let the inquirer begin by mastering more elementary problems.

Like all Holmes' reasoning, the thing seemed simplicity itself when it was once explained. Dr. Watson, speaking of Sherlock Holmes.

Any truth is better than indefinite doubt.

The devil’s agents may be of flesh and blood, may they not?

It is stupidity rather than courage to refuse to recognize danger when it is close upon you.