Everything in a story should be credible.
Every Sherlock Holmes story has at least one marvelous scene.
The more you put in your brain, the more it will hold - if you have one.
I think one or two of the later Holmes stories are among the best.
Only fools and philosophers waste time on the unknowable.
Labels are for the things men make, not for men. The most primitive man is too complex to be labeled.