So the majority of the highest classes of that age, even the popes and ecclesiastics, really believed in nothing at all. They did not believe in the Church doctrine, for they saw its insolvency; but neither could they follow Francis of Assisi, Kelchitsky, and most of the sectarians in acknowledging the moral, social teaching of Christ, for that undermined their social position. And so these people remained without any religious view of life. And, having none, they could have no standard with which to estimate what was good and what was bad art, but that of personal enjoyment.

What is Art? (1897)