Pope Francis reprised in shorter form the message he set out in his latest Encyclical Letter, Fratelli Tutti – Brothers and Sisters All. Namely, that God by his incarnation in Jesus Christ has demonstrated that God is in all, and that inasmuch as all are dependant children of God, we are all sisters and brothers.
So, you can find this in the text of Pope Francis’ homily delivered from Saint Peter’s Basilica on the occasion of the annual Urbi et Orbi Christmas blessing to the whole world which is available HERE