You've got me confused, Ref. I thought the current Unitarian Universalist hymnal was Singing the Living Tradition, published in 1993. Is there another titled Spirit of Life or are you talking about the song with that title? I like the words of the song, but I don't know that I've heard it.
I second your complaint about the UU tendency to change words of songs. Oftentimes, it reeks of the worst sort of Political Correctness. I have to say, however, that it's not as bad as the word-changing in some of the earlier UU hymnals I've seen. And I also have to say that it has introduced me to some wonderful songs I didn't know. I think Singing the Living Tradition is the most expensive hymnal I own - If I recall correctly, I paid thirty-seven bucks (long story - I asked the bookstore to check price, and she ordered one for me and I couldn't bring myself to refuse it). Shortly afterward, I found one at a thrift store for a buck, but my conscience got the best of me and I returned it to the church it had been stolen from.
I think the Unitarians would do well to make use of Worship in Song: A Friends Hymnal, and get out of the hymnal business.
-Joe, Roamin' Catholic, who feels very much at home with Unitarians-