"We cannot but speak about what we have seen and heard," taken from the Acts of the Apostles, is the theme chosen by Pope Francis for World Mission Day 2021 which will be observed on October 24th. In the message released January 29, 2021, the Pope emphasizes that "Once we experience the power of God's love, and recognize his fatherly presence in our personal and community life, we cannot help but proclaim and share what we have seen and heard."