It is unusual that the Responsorial Psalm today does not come from one of the 150 Psalms of the Bible but from one of the smaller, rather obscure Books of the Old Testament, the Book of Tobit. This is a family story, with a lesson about God's providence in our lives each day. God's kindness, mostly hidden, but finally revealed in the person of His messenger and agent, the angel Raphael, who has been the companion of Tobit and his son. After Raphael reveals his true identity, Tobit sings a song of thanksgiving, praise and blessing to God for all His greatness. Though Tobit is an exile from his homeland, he is full of hope and a sense of mission to tell people about God's greatness and how He has been at work in Tobit's own life. We sometimes call people "angels" because they are or have been kind and thoughtful and helpful to us. Maybe there is more truth in that name 'angel' than we realise, for the Lord's providence does work through the people and happenings of our lives, usually in ways we don't recognise at the time. Like with Raphael's disappearance from the presence of Tobit and his son, it is often only after the event that we see how truly blessed we have been and can then give thanks and praise, even in 'exile' (any trouble, difficulty, loneliness etc), to the Lord who has been with us but was unrecognised.