Since Jesus the Christ, the Son of God, clearly established His Catholic Church to teach, rule and sanctify in His Name, She has clearly taught what actions are right and what actions are wrong – morals, and that authority is clearly shown by steve b.
In Evangelium Vitae, #74, St John Paul II wrote that “each individual in fact has moral responsibility for the acts which he personally performs; no one can be exempted from this responsibility, and on the basis of it everyone will be judged by God himself.” The mission of the Church is to ensure that as many people as possible will be saved—to, in effect, prepare souls for judgment. And the Church’s greatest moral gift to the larger world is the certainty that no one is exempt from moral behavior: Not the rich, not the powerful, not the intellectual elite, not “the State”.
110. “The Church’s Magisterium intervenes not only in the sphere of faith, but also, and inseparably so, in the sphere of morals. It has the task of “discerning, by means of judgments normative for the consciences of believers, those acts which in themselves conform to the demands of faith and foster their expression in life and those which, on the contrary, because intrinsically evil, are incompatible with such demands”.172 In proclaiming the commandments of God and the charity of Christ, the Church’s Magisterium also teaches the faithful specific particular precepts and requires that they consider them in conscience as morally binding. In addition, the Magisterium carries out an important work of vigilance, warning the faithful of the presence of possible errors, even merely implicit ones, when their consciences fail to acknowledge the correctness and the truth of the moral norms which the Magisterium teaches.”
Given in Rome, at Saint Peter’s, on 6 August, Feast of the Transfiguration of the Lord, in the year 1993, the fifteenth of my Pontificate.
JOHN PAUL II