One should not speak of renewal but rather of decadence

Source

Cardinal Danielou founded the Cercle de St Jean Baptist that promoted the back to the early church movement.   They regarded the early church as a golden age of spiritual purity before doctrine was overlaid by medieval speculations.  The danger is that the church would be returned to her situation in her first days- given the haemoraging in the numbers of the faithful, this is exactly what has occurred.