" Although in general Gary applauded the modern trend toward individual self-management of retirement funds and long-distance calling plans and private-schooling options, he was less than thrilled to be given responsibility for his own personal brain chemistry, especially when certain people in his life, notably his father, refused to take any such responsibility. But Gary was nothing if not conscientious. As he entered the darkroom, he estimated that his levels of Neurofactor 3(i.e., serotonin: a very, very important factor) were posting seven-day or even thirty-day highs, that his Factor 2 and Factor 7 levels were likewise outperforming expectations, and that his Factor 1 had rebounded from an early-morning slump related to the glass of Armagnac he’d drunk at bedtime. "
― Jonathan Franzen , The Corrections