A person mature in the faith is able to recognise in various circumstances and encounters with his fellowman the invitation of God whereby he is called to work toward the fulfilment of the divine plan of salvation. Catechesis has the task, then, of emphasising this function by teaching the faithful to give a Christian interpretation to human events, especially to the signs of the limes, so that all "will be able to test and interpret all things in a wholly Christian spirit" (GS, 62).