While the theme of Advent is a focus on the coming of Jesus in three ways: his first, his present, and his final Advent, the readings for Gaudete Sunday deal with rejoicing in the Lord – Christian joy – as well as the mission of
John the Baptist and his connection with Advent. The theologian
Thomas Aquinas described the difference between joy and happiness. Happiness is the final end of man, eternal contemplation of God, which is an act of the intellect. Joy, however, is itself not a virtue, but is an effect of the virtue of charity ("love"), which is full if its object is eternal and the greatest, i.e. God. Joy admits no sorrow for it is not an act of the sensitive faculties, e.g. enjoying food is a natural joy for Thomas, but supernatural joy which is spoken of on Gaudete Sunday and in the Gospels is an act of the intellectual appetite known as the will. In his 2014 Gaudete Sunday homily,
Pope Francis said that Gaudete Sunday is known as the "Sunday of joy", and that instead of fretting about "all they still haven't" done to prepare for Christmas, people should "think of all the good things life has given you." ==Liturgical colour==