I never remember feeling tired by work, though idleness exhausts me completely.

There comes a time when for every addition of knowledge you forget something that you knew before.

The chief proof of mans greatness lies in his perception of his own smallness.

There was something awesome in the thought of the solitary mortal standing by the open window and summoning in from the gloom outside the spirits of the nether world.

It is a great thing to start life with a small number of really good books which are your very own.

And once again Mr. Sherlock Holmes is free to devote his life to examining those interesting little problems which the complexity of human life so pletifuly presents.

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.

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.

Skill is fine, and genius is splendid, but the right contacts are more valuable than either.