The teaching of the Church instructs us on things which are to be done and to be avoided, so that we, as followers of Jesus, might live the Christian life according to His will. As Christians, we should respond to God’s love by faith and action. If we truly love God, we shall seek to always do His holy will.
Christ directed His Apostles to teach us this when He said: “Go therefore and make disciples of all nations…teaching them to observe all that I have commanded you” (Matthew 28:19-20). He told His Apostles to go forth and preach the Gospel of the New Covenant to every nation, for He intended His Kingdom, the Church, to encompass all people. The Apostles gathered those who believed into communities, uniting them to Christ and to one another through God’s holy Word and the Mass.
Not only individuals, but all human society must make judgments and base its conduct on Christ’s teaching, at least implicitly. Only through the light of the Gospel will societies be able to recognize and respect the dignity of man and help man fulfill his destiny. Societies which reject the light of the Gospel easily become totalitarian. Their judgments and conduct reflect their own limited (and therefore, fallible) human vision of man and his destiny.