First Reading (Genesis 15:5-12.17-18)
God enters into a Covenant with Abraham, the man of faith.

Taking Abram outside the Lord said, "Look up to heaven and count the stars if
you can. Such will be your descendants" he told him. Abram put his faith in the
Lord, who counted this as making him justified.
"I am the Lord" he said to him "who brought you out of Ur of the Chaldaeans to
make you heir to this land." "My Lord, the Lord" Abram replied "how am I to
know that I shall inherit it?" He said to him, "Get me a three-year-old heifer, a
three-year-old goat, a three-year-old ram, a turtledove and a young pigeon." He
brought him all these, cut them in half and put half on one side and half facing
it on the other; but the birds he did not cut in half. Birds of prey came down on
the carcasses but Abram drove them off.
Now as the sun was setting Abram fell into a deep sleep, and terror seized him.
When the sun had set and darkness had fallen, there appeared a smoking
furnace and a fire-brand that went between the halves. That day the Lord made
a Covenant with Abram in these terms: "To your descendants I give this land,
from the wadi of Egypt to the Great River."


Responsorial Psalm (Psalm 26)

R/ Lord is my light and my help.

1. The Lord is my light and my help;
whom shall I fear?
The Lord is the stronghold of my life;
before whom shall I shrink? R/

2. O Lord, hear my voice when I call;
have mercy and answer.
Of you my heart has spoken:
"Seek his face." R/

3. It is your face, O Lord, that I seek;
hide not your face.
Dismiss not your servant in anger;
you have been my help. R/

4. I am sure I shall see the Lord's goodness
in the land of the living.
Hope in him, hold firm and take heart.
Hope in the Lord! R/

Second Reading (Philippians 3:20 – 4:1)
Christ will transfigure our bodies into copies of his glorious body.

For us, our homeland is in heaven, and from heaven comes the saviour we are
waiting for, the Lord Jesus Christ, and he will transfigure these wretched bodies
of ours into copies of his glorious body. He will do that by the same power with
which he can subdue the whole universe.
So then, my sisters and brothers and dear friends, do not give way but remain
faithful in the Lord. I miss you very much, dear friends; you are my joy and my
crown.


Alleluia (Matthew 17:5)
Glory and praise to you, O Christ! From the bright cloud the Father's voice was heard: "This is my Son, the Beloved. Listen to him". Glory and Praise to you, O Christ!

Gospel (Luke 9:28-36)
As Jesus prayed, the aspect of his face was changed.

Jesus took with him Peter and John and James and went up the mountain to
pray. As he prayed, the aspect of his face was changed and his clothing became
brilliant as lightning. Suddenly there were two men there talking to him; they
were Moses and Elijah appearing in glory, and they were speaking of his
passing which he was to accomplish in Jerusalem. Peter and his companions
were heavy with sleep, but they kept awake and saw his glory and the two men
standing with him. As these were leaving him, Peter said to Jesus, "Master, it is
wonderful for us to be here; so let us make three tents, one for you, one for
Moses and one for Elijah." – He did not know what he was saying. As he spoke,
a cloud came and covered them with shadow; and when they went into the
cloud the disciples were afraid. And a voice came from the cloud saying, "This is
my Son, the Chosen One. Listen to him." And after the voice had spoken, Jesus
was found alone. The disciples kept silence and, at that time, told no one what
they had seen.