This is the song "Living In The Past", a bonus track on Jethro Tull's Stand Up. Originally a single and had an album named after it.
Lyrics:
Happy, and I'm smiling, walk a mile to drink your water.
You know I'd love to love you, and above you there's no other
We'll go walking out while others shout of war's disaster.
Oh, be forgiving, let's go living in the past.
Once I'd used to join in every boy and girl was my friend.
Now there's revolution but they don't know what they're fighting.
Let us close our eyes. Outside their lives go on much faster
Oh, be forgiving, we'll keep living in the past.
Oh, be forgiving, let's go living in the past.
Oh, no, no, be forgiving, let's go living in the past.