Music of spiritual edification, music of mystical inspiration -almost an exercise in contemplation or adoration- that, following the words that the composer himself writes on the cover of the manuscript of the score, must be sung with the humblest devotion, wholeheartedly. ("humble Totius Cordis Devotione decantata"). In 1680 Buxtehude composes the cycle entitled Membra Jesu nostri, when Bach was not yet born. It was still almost 45 years before he wrote the first of two of his known passions, the St. John Passion. But with the composition of that music sheet, Buxtehude marks a before and after in the repertoire of music related to the Passion of Christ.