The Gospel reading at Mass came from John 21:1-19. Jesus revealed himself again to his disciples at the sea of Tiberias. While fishing from their boat, the disciples did not at first recognize Jesus standing on the shore. Finally, after he told them where to cast to net and they caught a large number of fish, the disciple whom Jesus loved said to Peter, "It is the Lord."
It is such a joy to recognize the presence of the one you love! Jesus is not physically with us today, but we can still realize his presence everywhere, in others, and especially in our own hearts. Such realizations should constantly fill us with joy.