Presented paper is a part of the cycle of the articles on the faith in St Ambrose’s letters. The second one – presented here – shows interpreters of the faith and those who in the special way are the examples and models of the faith and are responsible for the handing faith down to fellow Christians and to unbelievers. Without a doubt, all believers are obliged to bear witness to the faith, but the bishop of Milan shows in his letters the special groups of the faithful who are in a particular way responsible for the transmission of the faith and must be the models of faith. First of all Ambrose in his letters shows – according to the christian topos – the persons from the Bible and the martyrs as the spacial examples of faith. However, much more attention he pays to contemporary bishops and emperors of the Roman Empire who, according to Ambrose, in a special way are responsible for highlighting and giving an example of faith. In being an example of the Christian faith to others, the most important thing – according to Bishop of Milan – is persisting in its orthodoxy, perseverance in it, and of course observance the moral principles arising from the faith.