Strange indeed is human nature. Here were these men, to whom murder was familiar, who again and again had struck down the father of the family, some man against whom they had no personal feeling, without one thought of compunction or of compassion for his weeping wife or helpless children, and yet the tender or pathetic in music could move them to tears.

You have been in Afghanistan I perceive.

Watson. Come at once if convenient. If inconvenient, come all the same.

All other men are specialists, but his specialism is omniscience.

I am the most incurably lazy devil that ever stood in shoe leather.

It is a mistake to confound strangeness with mystery.

Our ideas must be as broad as Nature if they are to interpret Nature.