This is one of the few Sundays in the Christian year when all 4 of the lectionary readings are meant to compliment each other. So in Isaiah, in the action of the paired wings of the seraphim we see an image of Trinity. One pair covers the face (Father), another the feet (Son), and with the third they fly (Holy Spirit). In John we the Trinitarian nature of our salvation: God the Father loved us and sent the Son; we are drawn to and believe into the Son; and we are born anew of and by the work of the Holy Spirit. In Romans we see that as children of God, we are led by the Spirit of God, calling out to the Father, and being made joint-heirs with Christ the Son. As for the Psalm, in a polytheistic world, this temple song proclaimed that YHWH rules over all other gods in the heavens and on earth.
I think my focus is going to be that the unity in the Trinity ought to be manifested in unity in the church.
Here are the readings:
“Holy, holy, holy is the Lord Almighty;
the whole earth is full of his glory.”
4 At the sound of their voices the doorposts and thresholds shook and the temple was filled with smoke.
5 “Woe to me!” I cried. “I am ruined! For I am a man of unclean lips, and I live among a people of unclean lips, and my eyes have seen the King, the Lord Almighty.”
6 Then one of the seraphim flew to me with a live coal in his hand, which he had taken with tongs from the altar. 7 With it he touched my mouth and said, “See, this has touched your lips; your guilt is taken away and your sin atoned for.”
8 Then I heard the voice of the Lord saying, “Whom shall I send? And who will go for us?”
And I said, “Here am I. Send me!”
Now there was a Pharisee, a man named Nicodemus who was a member of the Jewish ruling council. 2 He came to Jesus at night and said, “Rabbi, we know that you are a teacher who has come from God. For no one could perform the signs you are doing if God were not with him.”
3 Jesus replied, “Very truly I tell you, no one can see the kingdom of God unless they are born again.
4 “How can someone be born when they are old?” Nicodemus asked. “Surely they cannot enter a second time into their mother’s womb to be born!”
5 Jesus answered, “Very truly I tell you, no one can enter the kingdom of God unless they are born of water and the Spirit. 6 Flesh gives birth to flesh, but the Spirit gives birth to spirit. 7 You should not be surprised at my saying, ‘You must be born again.’ 8 The wind blows wherever it pleases. You hear its sound, but you cannot tell where it comes from or where it is going. So it is with everyone born of the Spirit.”
9 “How can this be?” Nicodemus asked.
10 “You are Israel’s teacher,” said Jesus, “and do you not understand these things? 11 Very truly I tell you, we speak of what we know, and we testify to what we have seen, but still you people do not accept our testimony. 12 I have spoken to you of earthly things and you do not believe; how then will you believe if I speak of heavenly things? 13 No one has ever gone into heaven except the one who came from heaven—the Son of Man. 14 Just as Moses lifted up the snake in the wilderness, so the Son of Man must be lifted up, 15 that everyone who believes may have eternal life in him.”
16 For God so loved the world that he gave his one and only Son, that whoever believes in him shall not perish but have eternal life. 17 For God did not send his Son into the world to condemn the world, but to save the world through him.
1 Ascribe to the Lord, you heavenly beings,
ascribe to the Lord glory and strength.
2 Ascribe to the Lord the glory due his name;
worship the Lord in the splendor of his holiness.
3 The voice of the Lord is over the waters;
the God of glory thunders,
the Lord thunders over the mighty waters.
4 The voice of the Lord is powerful;
the voice of the Lord is majestic.
5 The voice of the Lord breaks the cedars;
the Lord breaks in pieces the cedars of Lebanon.
6 He makes Lebanon leap like a calf,
Sirion like a young wild ox.
7 The voice of the Lord strikes
with flashes of lightning.
8 The voice of the Lord shakes the desert;
the Lord shakes the Desert of Kadesh.
9 The voice of the Lord twists the oaks
and strips the forests bare.
And in his temple all cry, “Glory!”
10 The Lord sits enthroned over the flood;
the Lord is enthroned as King forever.
11 The Lord gives strength to his people;
the Lord blesses his people with peace.
Therefore, brothers and sisters, we have an obligation—but it is not to the flesh, to live according to it. 13 For if you live according to the flesh, you will die; but if by the Spirit you put to death the misdeeds of the body, you will live.
14 For those who are led by the Spirit of God are the children of God. 15 The Spirit you received does not make you slaves, so that you live in fear again; rather, the Spirit you received brought about your adoption to sonship. And by him we cry, “Abba, Father.” 16 The Spirit himself testifies with our spirit that we are God’s children. 17 Now if we are children, then we are heirs—heirs of God and co-heirs with Christ, if indeed we share in his sufferings in order that we may also share in his glory.