There are always some lunatics about. It would be a dull world without them.

My sister and I, you will recollect, were twins, and you know how subtle are the links which bind two souls which are so closely allied.

The best way of successfully acting a part is to be it.

Well, I'm a bacteriologist, you know. I live in a nine-hundred-diameter microscope. I can hardly claim to take serious notice of anything that I can see with my naked eye.

...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.

I fear that if the matter is beyond humanity, it is certainly beyond me.

"I should have more faith," he said; "I ought to know by this time that when a fact appears opposed to a long train of deductions it invariably proves to be capable of bearing some other interpretation."