The grand thing is to be able to reason backwards.

Do you know anything on earth which has not a dangerous side if it is mishandled and exaggerated?

Ah! my dear Watson, there we come into those realms of conjecture, where the most logical mind may be at fault. Sherlock Holmes speaking with Dr. Watson.

A man always finds it hard to realize that he may have finally lost a woman's love, however badly he may have treated her.

"Recognising, as I do, that you are the second highest expert in Europe" "Indeed, sir! May I inquire who has the honour to be the first?" Asked Holmes, with some asperity. "To the man of precised, scientific mind the work of Monsieur Bertillon must always appeal strongly." "Then had you not better consult him?" "I said, sir, to the precisely scientific mind. But as a practical man of affairs it is acknowledged that you stand alone. I trust, sir, that I have not inadvertently--" "Just a little," said Holmes.

Now is the dramatic moment of fate, Watson, when you hear a step upon the stair which is walking into your life, and you know not whether for good or ill.

When the impossible has been eliminated, all that remains no matter how improbable is possible.