It is the intention of the Church, however, to protect sacred music against anything that might lessen its dignity, since it is called upon to take part in something as important as divine worship. On this score sacred music obeys laws and rules which are no different from those prescribed for all religious art and, indeed, for art in general. These laws and standards for religious art apply in a stricter and holier way to sacred music because sacred music enters more intimately into divine worship than many other liberal arts, such as architecture, painting and sculpture. These last serve to prepare a worthy setting for the sacred ceremonies. Sacred music, however, has an important place in the actual performance of the sacred ceremonies and rites themselves. Hence the Church must take the greatest care to prevent whatever might be unbecoming to sacred worship or anything that might distract the faithful in attendance from lifting their minds up to God from entering into sacred music, which is the servant, as it were, of the sacred liturgy. Some artists, gravely offending against Christian piety, have dared to bring into churches works devoid of any religious inspiration and completely at variance with the right rules of art. They try to justify this deplorable conduct by plausible-looking arguments which they claim are based on the nature and character of art itself. They go on to say that artistic inspiration is free and that it is wrong to impose upon it laws and standards extraneous to art, whether they are religious or moral, since such rules seriously hurt the dignity of art and place bonds and shackles on the activity of an inspired artist.
These laws warn that great prudence and care should be used in this serious matter in order to keep out of churches polyphonic music which, because of its heavy and bombastic style, might obscure the sacred words of the liturgy by a kind of exaggeration, interfere with the conduct of the liturgical service or, finally, lower the skill and competence of the singers to the disadvantage of sacred worship. (Papal Encyclical, Musicae Sacrae, 25 December 1955).