How dull it is to pause, to make an end,
To rust unburnish'd, not to shine in use!
As tho' to breath were life. Life piled on life
Were all too little, and of one to me
Little remains: but every hour is saved
From that eternal silence, something more,
A bringer of new things; and vile it were
For some three suns to store and hoard myself,
And this gray spirit yearning in desire
To follow knowledge like a sinking star,
Beyond the utmost bound of human thought.

l. 22-32. - Ulysses (1842)