Watch out against the sin of resisting the Holy Spirit and always be open to the surprises of God. This was the exhortation of Pope Francis in his homily at Mass, Monday morning, in the chapel of the Casa Santa Marta residence in the Vatican. He was commenting on the episode of the Acts of the Apostles where St. Peter confronts the first Christian community regarding being open to pagans who joined the Church. Reflecting on the Acts of the Apostles episode, the Pope stressed that Holy Spirit always moves the Church and the Christian community.