You see, gentlemen, reason is unquestionably a fine thing, but reason is no more than reason, and it gives fulfillment only to man’s reasoning capacity, while desires are a manifestation of the whole of life—I mean the whole of human life, both with its reason and with all its itches and scratches. And though our life in these manifestations will often turn out a pretty sorry mess, it is still life and not a mere extraction of square roots. After all, I quite naturally want to live in order to fulfill my whole capacity for living, and not in order to fulfill my reasoning capacity alone, which is no more than some one-twentieth of my capacity of living.
— Fyodor Dostoevsky, Notes from Underground