Arthur Conan Doyle

Women are naturally secretive, and they like to do their own secreting. ”

I have frequently gained my first real insight into the character of parents by studying their children. ”

It is a capital mistake to theorize before one has data. ”

As Cuvier could correctly describe a whole animal by the contemplation of a single bone, so the observer who has thoroughly understood one link in a series of incidents should be able to accurately state all the other ones, both before and after. ”

The lowest and vilest alleys of London do not present a more dreadful record of sin than does the smiling and beautiful countryside. ”

From a drop of water a logician could infer the possibility of an Atlantic or a Niagara without having seen or heard of one or the other. ”

We can't command our love, but we can our actions. ”

Of all ghosts the ghosts of our old loves are the worst. ”

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. ”

Circumstantial evidence is occasionally very convincing, as when you find a trout in the milk, to quote Thoreau's example. ”