Any truth is better than indefinite doubt.

So swift, silent and furtive were his movements like those of a trained bloodhound picking out a scent, that I could not but think what a terrible criminal he would have made had he turned his energy and sagacity against the law instead of exerting them in its defense. -Dr. Watson, The Sign of the Four

The world is full of obvious things which nobody by any chance ever observes.

London, that great cesspool into which all the loungers and idlers of the Empire are irresistibly drained.

There is nothing more deceptive than an obvious fact.

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

...it is only when a man goes out into the world with the thought that there are heroisms all round him, and with the desire all alive in his heart to follow any which may come within sight of him, that he breaks away... from the life he knows, and ventures forth into the wonderful mystic twilight land where lie the great adventures and the great rewards.