"Look at the apostles: they were alone that morning, alone and bewildered, cowering behind closed doors, living in fear and overwhelmed by their weaknesses, failings and their sins, for they had denied Christ. The years they had spent with Jesus had not changed them: they were no different than they had been. Then, they received the Spirit and everything changed: the problems and failings remained, yet they were no longer afraid of them, nor of any who would be hostile to them. They sensed comfort within and they wanted to overflow with the comfort of God. Before, they were fearful; now their only fear was that of not testifying to the love they had received. Jesus had foretold this: '[The Spirit] will testify on my behalf; you also are to testify' (Jn 15:26-27)."
--Pope Francis, Homily, May 23, 2021