It is with nations as it is with individuals. A book of history is a book of sermons.

Detection is, or ought to be, an exact science, and should be treated in the same cold and unemotional manner.

Oh how I've missed you, Holmes.

‎A change of work is the best rest.

The soul is swayed by the waters.

Crime is common. Logic is rare. Therefore it is upon the logic rather than upon the crime that you should dwell.

Do you know, Watson," said he, "that it is one of the curses of a mind with a turn like mine that I must look at everything with reference to my own special subject. You look at these scattered houses, and you are impressed by their beauty. I look at them, and the only thought which comes to me is a feeling of their isolation and of the impunity with which crime may be committed there.