Finally we have to mention the "supreme fundamental law of the final end,"(21) on which all art depends. The basis of everything created, the fact of "being established by the divine reason," (22) automatically demands that all human acts are directed towards their ultimate end, which is the imitation of God's perfection.
Art and its works are therefore to be judged according to the measure of their full correspondence with man's final end.(23) Hence in all his endeavors man has the duty and the incommensurable obligation to measure everything he does, including his artistic activities, against the perfection of God: "You, therefore, must be perfect, as your heavenly Father is perfect."(24)
The artist who is active for the Church is especially confronted with this exacting demand. With the help of God, he will make every effort to meet it: "The execution of works of painting, sculpturing, and architecture [Note: Of course, also of other arts], must be entrusted only to artists who are experts in their field and who are able to give expression to true faith and devotion, which is the aim of all ecclesial art."(25)