Reason, gentlemen, is a fine thing, that is unquestionable, but reason is only reason and satisfies only man’s reasoning capacity, while wanting is a manifestation of the whole of life–that is, the whole of human life, including reason and various little itches.
And though our life in that manifestation often turns out to be a bit of trash, still it is life and not just the extraction of a square root. I, for example, want to live so as to satisfy my whole capacity for living, and not so as to satisfy just my reasoning capacity alone, which is some twentieth part of my whole capacity for living. What does reason know? Reason knows only what it has managed to learn . . . while human nature acts as an entire whole, with everything that is in it, consciously and unconsciously, and though it lies, still it lives.
Fyodor Dostoevsky, Notes From Underground