" I never guess. It is a shocking habit destructive to the logical faculty."
"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."
"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."
"Of all ghosts the ghosts of our old loves are the worst."
"I have frequently gained my first real insight into the character of parents by studying their children."
"Any truth is better than indefinite doubt."
Arthur Conan Doyle