Those who experience the Christian mystery are charged with the responsibility of telling others. Their aim is the awakening of faith in God. For, as Paul, I ask the questions, "How can men call upon him in whom they have not believed? And how can they believe in him of whom they have never heard? And how can they hear unless there is a preacher? And how can men preach unless they are sent? As it is written, 'How beautiful are the feet of those who preach good news!' But not all have heeded the gospel, for Isaiah says, 'Who, O Lord, has believed what he has heard from us?' So, faith comes from what is heard, and what is heard comes from the preaching of Christ."