“I believe that every one who sets about writing in earnest does his work, as a friend of mine phrased it, on something — tea, or coffee, or tobacco. I suppose there is a material waste that must be hourly supplied in such occupations, or that we should grow too abstracted, and the mind, as it were, pass out of the body, unless it were reminded often of the connection by actual sensation.”

~ Joseph Sheridan Le Fanu. In a Glass Darkly.