Matthew Arnold - Isolation: To Marguerite

We were apart; yet, day by day,
I bade my heart more constant be.
I bade it keep the world away,
And grow a home for only thee;
Nor fear'd but thy love likewise grew,
Like mine, each day, more tried, more true.

The fault was grave! I might have known,
What far too soon, alas! I learn'd--
The heart can bind itself alone,
And faith may oft be unreturn'd.
Self-sway'd our feelings ebb and swell--
Thou lov'st no more;--Farewell! Farewell!

Farewell!--and thou, thou lonely heart,
Which never yet without remorse
Even for a moment didst depart
From thy remote and spher{`e}d course
To haunt the place where passions reign--
Back to thy solitude again!

Back! with the conscious thrill of shame
Which Luna felt, that summer-night,
Flash through her pure immortal frame,
When she forsook the starry height
To hang over Endymion's sleep
Upon the pine-grown Latmian steep.

Yet she, chaste queen, had never proved
How vain a thing is mortal love,
Wandering in Heaven, far removed.
But thou hast long had place to prove
This truth--to prove, and make thine own:
'Thou hast been, shalt be, art, alone.'

Or, if not quite alone, yet they
Which touch thee are unmating things--
Ocean and clouds and night and day;
Lorn autumns and triumphant springs;
And life, and others' joy and pain,
And love, if love, of happier men.

Of happier men--for they, at least,
Have dream'd two human hearts might blend
In one, and were through faith released
From isolation without end
Prolong'd; nor knew, although not less
Alone than thou, their loneliness.

Matthew Arnold

http://www.poemhunter.com/poem/isolation-to-marguerite/