 Sailer lived in an era known as the "Enlightenment", which in its radical form disputed the fundamental dogmas of Christianity.It was characterized by contempt for Christian mysticism, a new worldliness of the clergy, relaxation of ecclesiastical discipline, denial of the primacy of papal jurisdiction, efforts of the State to gain control of the Church, turbulent reforms within the Church, and what many considered to be over-emphasis of intellect in education.By contrast, Sailer defended fundamental principles of Christianity and traditional practice, striving for a faith to be expressed in charity, for the maintenance of godliness, and for the training of a pious and intelligent clergy.