CCC 74 God “desires all men to be saved and to come to the knowledge of the truth”:1 that is, of Christ Jesus.2 Christ must be proclaimed to all nations and individuals, so that this revelation may reach to the ends of the earth:
God graciously arranged that the things he had once revealed for the salvation of all peoples should remain in their entirety, throughout the ages, and be transmitted to all generations.3

1 1 Tim 2:4.
2 cf. Jn 14:6.
3 DV 7; cf. 2 Cor 1:20; 3:16-4:6.