This gray spirit yearning in desire
To follow knowledge like a sinking star,
Beyond the utmost bound of human thought.
Source: Ulysses, 30
-- Alfred, Lord Tennyson, (Aug 6 1809-1892), English poet; He was the Poet Laureate, 1850-92 who wrote Charge of the Light Brigade, 1854 and Idylls of the King, 1885.