The Troparion and Kontakion, Our Holy Father Gregory the Theologian, Archbishop of Constantinople Feast Day on January 25th):

Like a shepherd’s flute, O Father Gregory, your theology vanquished the trumpets of orators, for searching the depths of the spirit, beauty of speech was increased in you. Pray Christ God that our souls may be saved.

Glory be to the Father and to the Son and to the Holy Spirit, now and for ever and ever, Amen.

O glorious saint, your tongue, versed in theology, loosed the webs of vain philosophers; you adorned the Church with a robe of true belief woven on high. Wearing it she cries with us, your children: Rejoice, O Father, highest mind of theology.