Now when it was late that same day, the first of the week, and the doors were shut, where the disciples were gathered together, for fear of the Jews, Jesus came and stood in the midst, and said to them: Peace be to you. And when he had said this, he shewed them his hands and his side. The disciples therefore were glad, when they saw the Lord. He said therefore to them again: Peace be to you. (....)And after eight days again his disciples were within, and Thomas with them. Jesus cometh, the doors being shut, and stood in the midst, and said: Peace be to you (Jn 20: 19-26).
This joyous day [Sunday] which passes by all too quickly, has a tinge of sadness....One must start life over again the next day - work, study. My heart feels as if it is in exile on earth....I yearn for eternal rest in heaven, where Sundays never end, in my Father's house (The Story of a Soul)
Today the glorious Alleluia of Easter resounds. Today's Gospel from John emphasizes that on the evening of that day he appeared to the Apostles and "showed them his hands and his side" (Jn 20: 20), that is, the signs of the painful passion with which his Body was indelibly stamped, even after the Resurrection. Those glorious wounds, which he allowed doubting Thomas to touch eight days later, reveal the mercy of God who "so loved the world that he gave his only Son" (Jn 3: 16).
This mystery of love is at the heart of the liturgy today, the Second Sunday of Easter, dedicated to the devotion of Divine Mercy. As a gift to humanity, which sometimes seems bewildered and overwhelmed by the power of evil, selfishness and fear, the Risen Lord offers his love that pardons, reconciles and reopens hearts to love. It is a love that converts hearts and gives peace. How much the world needs to understand and accept Divine Mercy! Lord, who reveal the Father's love by your death and Resurrection, we believe in you and confidently repeat to you today: Jesus, I trust in you, have mercy upon us and upon the whole world. (Regina Caeli of the 3 April 2005, the day following the death of Pope John-Paul II)