He did not teach that Mary was queen of heaven or a perpetual virgin; he did not tell people to pray to the saints. He prayed that his church - followers - would be one, not that one section of the church would claim superiority and holders of the only truth.
The doctrine known as the Communion of Saints is immortalized in the Apostle's Creed and is deeply connected to the Catholic understanding of Theosis.
Theosis is union with God the Father, through the work and Person of Christ, by the indwelling Holy Spirit. Peter described it in his epistle,
2 Peter 1:4
New Catholic Bible
By these he has given us his precious promises, great beyond all price, so that through them you may escape from the corruption with which evil desires have infected the world and thereby may come to share in the divine nature.
We “share in the divine nature” and as Paul put it, we become “one spirit” with God…
1 Corinthians 6:17
New Catholic Bible
But anyone who joins himself to the Lord becomes one spirit with him.
This in essence makes us living extensions of Jesus, or as Jesus put it, “branches of the true Vine”…
John 15:1-6
New Catholic Bible
1 “I am the true vine,
and my Father is the vinegrower.
2 He removes every branch
that does not bear fruit,
and every branch that does
he prunes to make it bear even more.
3 You have already been cleansed
by the word I have spoken to you.
4 “Abide in me,
as I abide in you.
Just as a branch cannot bear fruit by itself
unless it abides in the vine,
so you cannot bear fruit
unless you abide in me.
5 “I am the vine,
you are the branches.
Whoever abides in me, and I in him,
will bear much fruit.
Apart from me you can do nothing.
6 Whoever does not abide in me
will be thrown away like a withered branch.
Such branches are gathered up,
thrown into the fire, and burned.
The purpose of this divine union with God, though Christ, by the Spirit, is that Christ Himself be formed in us, as stated by St. Paul…
Galatians 4:19
New Catholic Bible
19 You are my children, and I am experiencing the pain of giving birth to you all over again, until Christ is formed in you.
This is why Paul wrote…
Galatians 2:20
New Catholic Bible
And now it is no longer I who live, but it is Christ who lives in me. The life I live now in the flesh I live by faith in the Son of God who loved me and gave himself up for me.
And so the ultimate purpose of salvation is union with God, becoming one spirit with God, becoming a living extension or branch of Christ, that Christ be formed in us, resulting in our being crucified with Christ as Christ Himself literally and spiritually lives His life through us. We become little “Christs” through His indwelling presence and so it becomes manifest that we are sons and daughters of God…
Galatians 4:6
New Catholic Bible
And because you are sons, God has sent into our hearts the Spirit of his Son, crying out “Abba! Father!”
1 John 3:2
New Catholic Bible
2 Beloved,
we are God’s children now.
What we shall be
has not yet been revealed.
However, we do know that when he appears
we shall be like him,
for we shall see him as he really is.
It is by virtue of this glorified state that the Saints literally and actually reign with Christ from Heaven, participating with and guiding the Church and believers right now on earth below…
2 Timothy 2:12
If we endure, we shall also reign with him. If we deny him, he will also deny us.
St. Athanasius spoke of this “Theosis” when he wrote…
“For the Son of God became man so that we might become God.”
This doesn’t mean we become “Gods” or little almighty beings as Mormons believe. It means God is formed and made manifest in us, His Saints. Ultimately we will become living extensions of God Himself. This is why Catholics venerate and Saints who appear and perform miracles through their prayers after their Beautification. We do not believe they are dead. They are very much alive, ruling and reigning with Christ presently. We’re venerating those who are now living extensions of God, branches of the True Vine, for Christ is manifest in them. And so our veneration of the Saints is an act that gives God glory, for it is acknowledging and honoring Christ in them.
Imagine being at an art museum and adoring a beautiful masterpiece painting…a Monet or Renoir. Who gets the glory when we adore such a masterpiece? The artist of course! lol. No artist will watch you adore his painting and scream, “No, no, no! Adore me! Forget my masterpiece, I’m the artist!!! Adore me!!!” lol. No, they will beam with joy as you adore their work. The Saints are living masterpieces reigning with Christ in Heaven. And as a result, our veneration and emulation of them glorifies God who calls us all to the same level of relationship and Sainthood.
Paul wrote…
1 Corinthians 11:1
New Catholic Bible
1 Be imitators of me, as I am of Christ.
So we follow and imitate the Saints as they are also followers and imitators of Christ.
We also read how Christ chose to share His glory with His Saints...
John 17:20-26
New Catholic Bible
20 “I pray not only on behalf of these,
but also for those who through their word
will come to believe in me.
21 May they all be one.
As you, Father, are in me
and I in you,
may they also be in us
so that the world may believe
that you have sent me.
22 “The glory that you have given me
I have given to them,
so that they may be one,
as we are one,
23 I in them and you in me,
that they may become completely one,
and thus the world may know
that you have sent me
and that you have loved them
even as you have loved me.
24 “Father, allow those you have given me
to be with me where I am,
so that they may behold my glory,
which you have bestowed on me
because you loved me
before the foundation of the world.
25 “Righteous Father,
the world has not known you;
I have known you,
and they have known that you have sent me.
26 I have made your name known to them,
and I will make it known,
so that the love with which you loved me
may be in them, and I in them.”
The Saints share in Christ's own glory, as Christ prayed we all would. This is a glory that comes from union of spirit with Christ and the Father through the Holy Spirit. The Father in Christ and Christ in us, the Saints. Like a vine and its branches, Christ and the Saints are a single organism. When you venerate a Saint, you give glory and honor to Christ, for it is the Christ in them that inspires the veneration, and longing to see the very same Theosis in ourselves. It's giving reverence and honor to those who have attained union with God, through Christ, by the Holy Spirit.
The Bible include an allusions to the authority of the Saints in the Gospels and the Epistles when it reads...
Luke 19:16-19
New Catholic Bible
16 The first came forward and said, ‘Sir, your money has increased tenfold in value.’ 17 He said to him, ‘Well done, my good servant. Because you have proved trustworthy in this very small matter, you shall be in charge of ten cities.’ 18 “Next, the second servant came forward and said, ‘Sir, your money has increased fivefold in value.’ 19 He said to him, ‘You shall be in charge of five cities.’
1 Corinthians 9:25
New Catholic Bible
Everyone who seeks a prize submits himself to rigorous self-discipline in every respect. They do so to win a perishable crown, while we seek an imperishable one.
2 Timothy 4:8
New Catholic Bible
Now waiting for me is the crown of righteousness, which the Lord, the righteous judge, will award to me on that Day—and not only to me, but to all those who have eagerly longed for his appearance.
Revelation 3:21
New Catholic Bible
To anyone who is victorious, I will give the right to sit with me on my throne, as I myself overcame and sat with my Father on his throne.
Yes, the Saints receive crowns (awarded authority) are appointed authority over entire nations on earth and even aspects of daily life. They are seated with Christ in Heaven in His throne (His court of authority), and they rule and reign with Him.
Please understand, the ancient tongue uses two terms for worship. One is "latria". Latria is the worship and honor given only to God. The other is "dulia". Dulia is the honor or respect given to holy things, places, or people, living or in glory. For example, all of us "dulia" the Bible and would not use it disrespectfully. And so it could be said we all "venerate (dulia) the Bible".
St. Mary, being Christ’s Mother, holds the highest rank among the Saints of Heaven, being Queen of Heaven, and so her veneration is most widely practiced.
We believe the Holy Spirit continues to work through the Saints who are ruling and reigning with Christ just as He did while they walked the earth. And so we give them dulia and offer prayers requesting their prayers and aid just as we would brothers and sisters who are filled with the Holy Spirit and have a history of miraculous faith dwelling among us.
We are all called to be Saints. We experience Theosis through the Sacraments, prayer, fasting, contemplation, reading Scripture, and embracing the various devotions of Sacred Tradition that speak to our souls. Through all these things we strive to experience our own Theosis and become Saints, which we believe is the entire purpose of salvation. It’s not about going to Heaven and strumming harps forever. It’s about manifesting Christ in us that we might be glorified with Jesus in order to rule and reign with Him and aid in guiding and serving the Church from Heaven above with Him.
The Saints ruling and reigning with Christ presently are called the Church Triumphant. We who are alive and enduring in the world below are the Church Militant. Those experiencing purgatory are the Church Suffering. We're all a single body connected by the web of our worship and prayer.
I pray I’ve helped to clarify the Catholic understanding of the Veneration of the Saints/Communion of the Saints.
God bless.
Hebrews 1:1-3
New Catholic Bible
1 Therefore, since we are surrounded by such
a great cloud of witnesses, let us throw off everything that weighs us down and the sins that so easily distract us and with perseverance run the race that lies ahead of us, 2 with our eyes fixed on Jesus, the author and perfecter of our faith. For the sake of the joy that lay before him, he endured the cross, ignoring its shame, and is now seated at the right hand of the throne of God.