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.

When such men, who are beyond hope and fear, begin in their dim minds to see the source their woes, it may be an evil time for those who have wronged them. The weak man becomes strong when he has nothing, for then only can he feel the wild, mad thrill of despair.

We surely know by some nameless instinct more about our futures than we think we know.

It is a capital mistake to theorize before you have all the evidence. It biases the judgment.

While the individual man is an insoluble puzzle, in the aggregate he becomes a mathematical certainty. You can, for example, never foretell what any one man will be up to, but you can say with precision what an average number will be up to. Individuals vary, but percentages remain constant. So says the statistician.

We balance probabilities and choose the most likely. It is the scientific use of the imagination.