Catechism in a Year
Tuesday, May 22, 2018
172. Why must the Church proclaim the Gospel to the whole world?
The Church must do so because Christ has given the command: "Go therefore and make disciples of all nations, baptizing them in the name of the Father and of the Son and of the Holy Spirit" (Matthew 28:19). The missionary mandate of the Lord has its origin in the eternal love of God who has sent his Son and the Holy Spirit because "he desires all men to be saved and to come to the knowledge of the truth" (1 Timothy 2:4).
Further reading: CCC 849-851
173. In what sense is the Church missionary?
The Church, guided by the Holy Spirit, continues the mission of Christ himself in the course of history. Christians must, therefore, proclaim to everyone the Good News borne by Christ; and following his path, they must be ready for self-sacrifice, even unto martyrdom.
Further reading: CCC 852-856
These excerpts are from the Compendium of the CCC