Drink! for you know not whence you came, nor why:
Drink! for you know not why you go, nor where.
Source: The Rubaiyat of Omar Khayyam, LXXIV
-- Edward Fitzgerald, (Mar 31 1809-1883), English poet, critic, translator; He is best known for the The Rub?iy?t of Omar Khayy?m.