First Reading, A reading from the prophet Isaiah Is 22:19-23

I place the key of the House of David upon his shoulder.

Thus says the Lord of hosts to Shebna, the master of the palace: I dismiss you from your office, I remove you from your post, and the same day I call on my servant Eliakim son of Hilkiah. I invest him with your robe, gird him with your sash, entrust him with your authority; and he shall be a father to the inhabitants of Jerusalem and to the House of Judah. I place the key of the House of David on his shoulder; should he open, no one shall close, should he close, no one shall open. I drive him like a peg into a firm place; he will become a throne of glory for his father’s house.

This is the word of the Lord

Second Reading, A reading from the letter of St Paul to the Romans Rom 11:33-36

From him, through him, and in him are all things.

How rich are the depths of God – how deep his wisdom and knowledge – and how impossible to penetrate his motives or understand his methods! Who could ever know the mind of the Lord? Who could ever be his counsellor? Who could ever give him anything or lend him anything? All that exists comes from him; all is by him and for him. To him be glory for ever! Amen.

This is the word of the Lord

A reading from the holy Gospel according to Matthew Mt 16:13-20

You are Peter, to you I will give the keys of the kingdom of heaven.

When Jesus came to the region of Caesarea Philippi he put this question to his disciples, ‘Who do people say the Son of Man is?’ And they said, ‘Some say he is John the Baptist, some Elijah, and others Jeremiah or one of the prophets.’ ‘But you,’ he said ‘who do you say I am?’ Then Simon Peter spoke up, ‘You are the Christ,’ he said, ‘the Son of the living God.’ Jesus replied, ‘Simon son of Jonah, you are a happy man! Because it was not flesh and blood that revealed this to you but my Father in heaven. So I now say to you: You are Peter and on this rock I will build my Church. And the gates of the underworld can never hold out against it. I will give you the keys of the kingdom of heaven: whatever you bind on earth shall be considered bound in heaven; whatever you loose on earth shall be considered loosed in heaven.’ Then he gave the disciples strict orders not to tell anyone that he was the Christ.

This is the Gospel of the Lord.