52 We realize that it would take Us too long to describe here, even in barest outline, the way in which the Christian life should be lived today, and We have no intention of embarking on such an undertaking now. In any case, you are well aware of the moral needs of our time, and you will not cease in your efforts to bring the faithful to a realization of the dignity, the purity and the seriousness of the Christian life. Nor will you fail to do all you can to denounce, even publicly, the moral dangers and vices of our age. We all remember the solemn exhortations uttered in Holy Scripture: "I know thy works and thy labor and thy patience and how thou canst not bear them that are evil." (35) These words will inspire us to become watchful and diligent pastors. The Ecumenical Council will give us new and profitable instructions, and we should be preparing ourselves even now to welcome them and to put them into effect. Two Fundamental Gospel Precepts
Source: Ecclesiam Suam (Vatican.va)