Priest: Let us pray to the Lord.
People: Lord have mercy.
Priest: (in a low voice) Holy God, You dwell among Your saints. You are praised by the Seraphim with the thrice-holy hymn, and glorified by the Cherubim and worshiped by all the heavenly powers. You have brought all things out of nothing into being.Priest: Let us pray to the Lord.
People: Lord have mercy.
Priest: (in a low voice) Holy God, You dwell among Your saints. You are praised by the Seraphim with the thrice-holy hymn, and glorified by the Cherubim and worshiped by all the heavenly powers. You have brought all things out of nothing into being. You have created man and woman in Your image and likeness, and adorned them with all the gifts of Your grace. You give wisdom and understanding to the supplicant and do not overlook the sinner, but have established repentance as the way of salvation. You have enabled us, Your lowly and unworthy servants, to stand at this hour before the glory of Your holy altar and to offer to You due worship and praise. Master, accept the thrice-holy hymn also from the lips of us sinners and visit us in Your goodness. Forgive our voluntary and involuntary transgressions, sanctify our souls and bodies, and grant that we may worship and serve You in holiness all the days of our lives, by the intercessions of the holy Theotokos and of all the saints who have pleased You throughout the ages. (aloud) For You are holy, our God, and to You we give glory, to the Father and the Son and The Holy Spirit, now and forever and to the ages of ages.
People: Amen. Holy God, Holy Mighty, Holy Immortal, have mercy on us. (3) Glory to the Father and the Son and the Holy Spirit, now and forever and to the ages of ages. Amen. Holy Immortal, have mercy on us.
Priest: Dynamis (fervently)!
People: Amen. Holy God, Holy Mighty, Holy Immortal, have mercy on us.

(The Divine Liturgy of St. John Chrysostom, pp. 9-10)

As we mentioned As we mentioned before, the Liturgy that takes place in our churches is intimately connected with the Liturgy of the angels that surround the throne of God. In fact, a few of the hymns that we use were revealed to us by angels as hymns that they use in their heavenly worship. The Trisagion is one of them, and we celebrate its miraculous revelation every September 25. Here is an excerpt from the Synaxarion (collection of daily readings about saints and feasts): "During the reign of the Emperor Theophilus, the city of Constantinople was visited by earthquakes for almost four months. The Emperor, the Patriarch Proclus [who is actually St. Proclus, the disciple of St. John Chrysostom, whose feast is celebrated on November 20th], and the people joined in a barefoot procession to make prayer to God for their safety. While they were gathered, the tremors increased dramatically, and a young boy was taken up into the sky in the sight of the people, who fearfully cried out Kyrie eleison! When the boy came down from the heavens, he said that he had been among choirs of Angels who sang, “Holy God, Holy Mighty, Holy Immortal, have mercy on us!” and that a voice had commanded him to tell the Patriarch that the people should make supplication to God in this way. The Patriarch instructed the people to chant this hymn, whereupon the ground stopped shaking and the child died. The Empress Pulcheria (feastday: September 10) asked the Patriarch to order that this hymn be chanted henceforth in the Divine Liturgy, as it still is today."

The mystical prayer that accompanies the singing of the angelic hymn is a reminder of God’s majesty and omnipotence in contrast to our sinful ways. God is the Creator of all things, both visible (the material world) and invisible (the heavenly world of angels and spirits). He created all of it out of “things that were not” (2 Maccabees 7:28), but man and woman He created in His own image (Genesis 1:27). God is both Creator and Provider; He even provides the sinners—those who move away from Him—with the possibility to repent, to change their ways and come back to Him. This is called salvation, and is done always through Christ—by believing in Him, following His example and proclaiming Him to the unbelievers. When we turn back to God in repentance and humility, He forgives not only the mistakes that we committed in full knowledge, but also those we are unaware of. He makes holy both our souls and our bodies, healing the wound of sin. Once again we invoke as our helpers and friends the most holy Mother of God and all the saints.

Amen - so be it!