Catechism of the Catholic Church §1913 — excerpt
"Participation" is the voluntary and generous engagement of a person in social interchange. It is necessary that all participate, each according to his position and role, in promoting the common good.
This translation is under copyright, so only the cited words are quoted here. Follow the link for the full text. Translation: English translation of the Catechism of the Catholic Church, 2nd ed. (Libreria Editrice Vaticana), as posted at vatican.va.