His Ignorance was as remarkable as his knowledge.
He possesses two out of the three qualities necessary for the ideal detective. He has the power of observation and that of deduction. He is only wanting in knowledge.
Good old Watson! You are the one fixed point in a changing age.
Evil indeed is the man who has not one woman to mourn him.
Every man finds his limitations, Mr. Holmes, but at least it cures us of the weakness of self-satisfaction.
Even the best of us are thrown off sometimes.
Eliminate all other factors, and the one which remains must be the truth.
Education never ends, Watson. It is a series of lessons with the greatest for the last.
Depend upon it, there is nothing so unnatural as the commonplace.
Circumstantial evidence is a very tricky thing. It may seem to point very straight to one thing, but if you shift your own point of view a little, you may find it pointing in an equally uncompromising manner to something entirely different.
But I have reasons to suppose that this opinion would be very much more frank and valuable if he imagines that we are alone.
