It is an old maxim of mine that when you have excluded the impossible, whatever remains, however improbable, must be the truth.

Several incidents in my life have convinced me of spiritual interposition - of the promptings of some beneficent force outside ourselves, which tries to help us where it can.

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.

I am not the law, but I represent justice so far as my feeble powers go.

Work is the best antidote to sorrow, my dear Watson.

Never trust to general impressions, my boy, but concentrate yourself upon details.