26 We must not regard the divine Gospel - the teaching of Jesus Christ which He entrusted to the Catholic Church for interpretation - as something beyond us and finished. Rather must we realize that it is something living, something vigorous. The Gospel can show men the one certain path to truth, to justice, to all virtue; it can lead them to fraternal union and peace; it can be a strong and unshakable bulwark for their laws, their institutions, and their communities.
Source: Invicti Athletae (Vatican.va)