Some of them are for Vash, some for the children. Yes, I picture Wolfwood teaching sixties spiritual anthems to the wee orphans, probably on a dinky upright piano that hasn't been tuned for a decade and with half a dozen dead keys due to sand getting in. It's the context, see - on a desert planet, Leonard Cohen's merciful rivers and Cat Stevens' dew-drenched water-Eden become loaded symbolism.
...The above would have gone in personal email, but the next bit, here, is too good not to share out: Leonard Cohen's "Hallelujah", in three versions.
Leonard Cohen
Jeff Buckley
Rufus Wainwright
Like... Father, Son, and Holy Ghost. What are the chances? (The lyrics are completely different. It appears Boushi Cohen wrote something like ten verses to the song, recorded only half of them, and performs the other half depending on what he had for breakfast that morning. Jeff and Rufus went for the obscure ones.)
...Gawd, listening to this is making me descend rapidly into emo-ness again.
Maybe there's a God above
And all I ever learned from love
Was how to shoot at someone who outdrew you
It's not a cry you can hear at night
It's not somebody who's seen the light
It's a cold and it's a broken Hallelujah...