This song by David MacGregor, a UCA minister in Brisbane, Qld is quite remarkable. I thought it needed a choir for the chorus so I created a four part harmony as included below.
Full piano arrangement can be found in Resources 2016, Advent, Christmas and Epiphany, Centre for Music, Liturgy and the Arts, North Adelaide, South Australia. Web page
David MacGregor will also be able to supply the full piano arrangement. Email.