"I'm proud to be a hippy from Olema
Where we're friends with all the squares and all the straights
We still take in strangers if they're Haggard
And we can't think of anyone to hate..."

Yep, it was the Youngbloods, but I don't know who actually wrote it...

How 'bout the hymn with the second verse that starts :
"By the light of burning martyrs..."