Chapter Three treats the theme “In The Light of the Master.” We turn from warnings against pelagians and gnostics to what constitutes real holiness. In this chapter (63-109) the Holy Father will take us through the Beatitudes (65-94) and examine with us this crucial meditation from the Sermon on the Mount.
63. There can be any number of theories about what constitutes holiness, with various explanations and distinctions. Such reflection may be useful, but nothing is more enlightening than turning to Jesus’ words and seeing his way of teaching the truth. Jesus explained with great simplicity what it means to be holy when he gave us the Beatitudes (cf. Matthew 5:3-12; Luke 6:20-23). The Beatitudes are like a Christian’s identity card. So if anyone asks: “What must one do to be a good Christian?”, the answer is clear. We have to do, each in our own way, what Jesus told us in the Sermon on the Mount. [Cf. Homily at Mass in Casa Santa Marta, 9 June 2014] In the Beatitudes, we find a portrait of the Master, which we are called to reflect in our daily lives.
64. The word “happy” or “blessed” thus becomes a synonym for “holy”. It expresses the fact that those faithful to God and his word, by their self-giving, gain true happiness.
Would you agree happy, blessed, and holy are all related?
You can check the full document Gaudete et Exsultate on the Vatican website.