ክርስቲያኖች በቤተ ክርስቲያን ሕይወት ውስጥ የማኖራቸው የተሳትፎ ሃላፊነት ወንጌልንና ከእርሱም የሚመነጩ ግዴታዎችን እንዲመሰክሩ ያስገድዳቸዋል።
"The duty of Christians to take part in the life of the Church impels them to act as witnesses of the Gospel and of the obligations that flow from it.