And this grey spirit yearning in desire
To follow knowledge like a sinking star,
Beyond the utmost bound of human thought.
Come, my friends,
‘Tis not too late to seek a newer world.
Push off, and sitting well in order smite
The sounding furrows; for my purpose holds
To sail beyond the sunset, and the baths
Of all the western stars, until I die. – “Ulysses”, Alfred, Lord Tennyson