Mediocrity knows nothing higher than itself, but talent instantly recognizes genius.

How often have I said to you that when you have eliminated the impossible, whatever remains, however improbable, must be the truth?

The case has, in some respects, been not entirely devoid of interest.

It has long been an axiom of mine that the little things are infinitely the most important.

You see, but you do not observe.

It is a capital mistake to theorize before one has data. Insensibly one begins to twist facts to suit theories, instead of theories to suit facts.

This is quite a three-pipe problem.