"It is my belief, Watson, founded upon my experience, that the lowest and vilest alleys of London do not present a more dreadful record of sin than does the smiling and beautiful countryside."

"His ignorance was as remarkable as his knowledge."

"My mind rebels at stagnation. Give me problems, give me work, give me the most abstruse cryptogram, or the most intricate analysis, and I am in my own proper atmosphere. But I abhor the dull routine of existence. I crave for mental exaltation."

"Depend upon it there comes a time when for every addition of knowledge you forget something that you knew before. It is of the highest importance, therefore, not to have useless facts elbowing out the useful ones."

"Men are so simple and so much inclined to obey immediate needs that a deceiver will never lack victims for his deceptions."

"There is, hidden or flaunted, a sword between the sexes till an entire marriage reconciles them."

"Everyone is a moon, and has a dark side which he never shows to anybody."

"It is a profound truth that art is the soul's attempt to give enduring form to the formless."