[Holly Martins]

Into my heart an air that kills
From yon far country blows:
What are those blue remembered hills,
What spires, what farms are those?

That is the land of lost content,
I see it shining plain,
The happy highways where I went
And cannot come again.

A.E. Housman

This must be one of the saddest poems ever written. It's interesting that in such a short poem both 'blue remembered hills' and 'land of lost content' have become (relatively) common phrases.