To underestimate oneself is as much an exaggeration of one's powers than the other.

Anything seems commonplace, once explained.

Education never ends, Watson. It is a series of lessons, with the greatest for the last.

A fine thought in fine language is a most precious jewel, and should not be hid away, but be exposed for use and ornament.

No man lives or has ever lived who has brought the same amount of study and of natural talent to the detection of crime which I have done.

It was easier to know it than to explain why I know it. If you were asked to prove that two and two made four, you might find some difficulty, and yet you are quite sure of the fact. ~ Sherlock Holmes

I have seen too much not to know that the impression of a woman may be more valuable than the conclusion of an analytical reasoner.