Old age hath yet his honour and his toil;
Death closes all: but something ere the end,
Some work of noble note, may yet be done...
'Tis not too late to seek a newer world...
Tho' much is taken, much abides; and tho'
We are not now that strength which in old days
Moved earth and heaven; that which we are, we are;
One equal temper of heroic hearts,
Made weak in time and fate, but strong in will
To strive, to seek, and not to yield.

From tennyson's Ulysses