I rose to go, but Holmes caught me by my wrist and pushed me back into my chair. 'It is both, or none,' said he. 'You may say before this gentleman anything which you may say to me.
Watson. Come at once if convenient. If inconvenient, come all the same.
A man with so large a brain must have something in it.
I felt Holmes's hand steal into mine and give me a reassuring shake. - Watson
Eliminate all other factors, and the one which remains must be the truth.
It may be that you are not yourself luminous, but that you are a conductor of light. Some people without possessing genius have a remarkable power of stimulating it.