In Lent 1937 Pope Pius XI issued the encyclical "Mit brennender Sorge" (With burning sorrow) with the help of German bishops and Cardinal Pacelli (later Pope Pius XII).

For we ourselves were once foolish, disobedient, deluded, slaves to various desires and pleasures, living in malice and envy, hateful ourselves and hating one another. But when the kindness and ...