text: On recent work on this concept opens by claiming that the "joy of (it)" is the "joy of the Church."
full_question: On recent work on this concept opens by claiming that the "joy of (it)" is the "joy of the Church." Later on in that work, its writer notes that this concept is not jealous, boastful, or rude, and also claims that if we possess this quality with regards to others, God will abide in us. For ten points - name this concept, whose "Happiness" is described in a 2016 exhortation by a leader who resides in Vatican City.
first_sentence: On recent work on this concept opens by claiming that the "joy of (it)" is the "joy of the Church."