"Ulysses" (excerpt) by Tennyson

Come, my friends, 'tis not too late to seek a newer world.
For my purpose holds to sail beyond the sunset; and 'tho
we are not that strength which in old days moved earth
and heaven; that which we are, we are; one equal temper
of heroic hearts, made weak by time and fate, but strong
in will to strive, to seek, to find, and not to yield.