I think there are certain crimes which the law cannot touch, and which therefore, to some extent, justify private revenge.

The chief proof of man's real greatness lies in his perception of his own smallness.

Draw your chair up, and hand me my violin, for the only problem which we have still to solve is how to while away these bleak autumnal evenings.

I say, Watson,’ he whispered, ‘would you be afraid to sleep in the same room as a lunatic, a man with softening of the brain, an idiot whose mind has lost its grip?’ ‘Not in the least,’ I answered in astonishment. ‘Ah, that’s lucky,’ he said, and not another word would he utter that night.

When the impossible has been eliminated, all that remains no matter how improbable is possible.

A dog reflects the family life. Whoever saw a frisky dog in a gloomy family, or a sad dog in a happy one? Snarling people have snarling dogs, dangerous people have dangerous ones.

There are times, young fellah, when every one of us must make a stand for human right and justice, or you never feel clean again.