Contemporary troubador Paul Hillier has been one of the key players behind introducing Arvo Part's music to Western audiences, first through recordings with the Hilliard Ensemble and later through his magnificently innovative group Theatre of Voices. I Am the True Vine continues the collaboration by bringing together some truly vintage Part compositions from the '90s. Although it exists on disc in a more elaborate version for choir and strings, the 1990 Berlin Mass was originally written for just four solo voices and organ. Part later revised the score, returning to that original sonority, which is the version offered here. The consummate preparation of the Theatre of Voices, in which every line is lovingly unfurled, the whole building into a memorable aural sculpture, only heightens a listener's admiration for Part's ability to make the seemingly simple profound. We also hear the composer in a more overtly joyful mood than usual in the short first selection, while the title track--a setting of a text from the Gospel of John and one of three world premiere recordings here--is a marvelously organic example of word painting (representing Part's choral virtuosity even when it comes to setting English text).