ooh I love this song; beautiful lyrics...we sang it in high school choir...
Pippin has a lot of great ones; we also did Godspell a million times and it also has some great songs by Schwartz...

Come sing about sweet rejoicing
Come sing of love
We're not afraid of voicing
All the things we're dreaming of
Oh, high and low, and everywhere we go
We can build a beautiful city
Yes we can, oh yes we can
We can build a beautiful city
And call it ours
And call it the city of man...