Lord Tennyson

I reckon the bottom line is British poetry has some fantastic lines contained in it. Here are some (mostly) from Tennyson.

"I am a part of all that I have met;
Yet all experience is an arch where though
Gleams that untraveled world whose margin fades
Forever and forever when I move." -- Ulysses, Lord Tennyson

"How dull it is to pause, to make an end
To rust unburnished, not to shine in use!
As though to breathe were life!..." -- Ulysses, Lord Tennyson

"...Come, my friends
'Tis not too late to seek a newer world." -- Ulysses, Lord Tennyson

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"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 by time and fate, but strong in will
To strive, to seek, to find, and not to yield." -- Ulysses, Lord Tennyson

"Twilight and evening bell,
___And after that the dark!
And may there be no sadness of farewell
___When I embark;" -- Crossing the Bar, Lord Tennyson 

"But it is over as the tale once told." -- Dead Before Death, C. Rossetti