Let us hear the suspicions. I will look after the proofs.

I never guess. It is a shocking habit destructive to the logical faculty.

The emotional qualities are antagonistic to clear reasoning.

I cannot live without brainwork. What else is there to live for? Stand at the window here. Was ever such a dreary, dismal, unprofitable world? See how the yellow fog swirls down the street and drifts across the duncoloured houses. What could be more hopelessly prosaic and material?

What one man can invent, another can discover.

On glancing over my notes of the seventy odd cases in which I have during the last eight years studied the methods of my friend Sherlock Holmes, I find many tragic, some comic, a large number merely strange, but none commonplace; for, working as he did rather for the love of his art than for the acquirement of wealth, he refused to associate himself with any investigation which did not tend towards the unusual, and even the fantastic.

So all life is a great chain, the nature of which is known whenever we are shown a link of it.