Holy, Holy, Holy: the mystery of the Holy Trinity
Catholics believe that the teaching of the Trinity - one God in three persons - is revealed throughout the Bible.
The Parable of the Prodigal Son (Luke 15:11-32)
The parable of the prodigal son tells the story of a man who squanders his inheritance in a foreign land, hits rock bottom, and then returns home to his loving father, who instantly welcomes him home.