This is the final paragraph of Tennyson's "Ulysses".
Original text:
We
are not now that strength which in the 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
Although our strength is not as good as before,
We are far from the majestic figure that moved the world in the past,
But we are still us, with heroic hearts
Although time has passed away and destiny has weakened,
Our will is as strong as ever, and we persist
struggle, explore, and seek without giving in.