Saint Gregory, pray for us.
Troparion (Tone 8) 
- O light of Orthodoxy, teacher of the Church, its confirmation,
- O ideal of monks and invincible champion of theologians,
- O wonder working Gregory, glory of Thessalonica and preacher of grace,
- always intercede before the Lord that our souls may be saved.
- Holy and divine instrument of wisdom,
- joyful trumpet of theology,
- together we sing your praises, O God-inspired Gregory.
- Since you now stand before the Original Mind, guide our minds to Him, O Father,
- so that we may sing to you: "Rejoice, preacher of grace."