Old fathers, great-grandfathers,
Rise as kindred should.
If ever lover's loneliness
Came where you stood,
Pray that Heaven protect us
That protect your blood.

The mountain throws a shadow,
Thin is the moon's horn;
What did we remember
Under the ragged thorn?
Dread has followed longing,
And our hearts are torn.

William Butler Yeats

http://www.poemhunter.com/poem/love-s-loneliness/