I’m with composer Paul Jernberg once again. Our starting point is the following excerpt from Musicam Sacram and the following statement:
Musicians will enter on this new work with the desire to continue that tradition which has furnished the Church, in her divine worship, with a truly abundant heritage. Let them examine the works of the past, their types and characteristics, but let them also pay careful attention to the new laws and requirements of the liturgy, so that "new forms may in some way grow organically from forms that already exist, and the new work will form a new part in the musical heritage of the Church, not unworthy of its past.
How does a composer balance the new with the traditional, proscribed forms with invention? Paul gives us his approach.