Acquired glory belongs to the man of Christ, not to Father or Word
Eustathius is explaining why the Psalms of Ascents speak of glory being given: it cannot belong to the Father or the Word, but only to the man of Christ raised from the dead.
The Father does not receive acquired glory, for he is perfect, infinite, incomprehensible, and without need of beauty and every seemliness. Nor does his Word receive it, for he is God begotten from the Father, through whom angels and heavens and the boundless expanses of the earth have come to be, and in short all the materials and constitutions of created things. Rather, it is the man of Christ who, being raised from the dead, is exalted and glorified, while his enemies openly took up shame. Those who took up hatred against him out of envy and were fenced in by a hostile battle-line are scattered, since the Word and God has fittingly raised his own temple.
Greek
Oratio in inscriptione psalmorum graduum (fragmenta) Ο ΛΟΓΟΣ ΕΙΣ ΤΑΣ ΕΠΙΓΡΑΦΑΣ ΤΩΝ ΑΝΑΒΑΘΜΩΝ 33 ∆όξαν δὲ ἐπίκτητον ὁ Πατὴρ οὐκ ἐπιδέχεται, τέλειος, ἄπειρος, ἀπερινόητος ὢν, ἀπροσδεὴς κάλλους καὶ παντοίας εὐπρεπείας. Ἀλλ' οὐδὲ ὁ Λόγος αὐτοῦ, Θεὸς ὢν ὁ γεννηθεὶς ἐξ αὐτοῦ, δι' οὗ γεγόνασιν ἄγγελοι καὶ οὐρανοὶ καὶ γῆς ἄπειρα μεγέθη καὶ πᾶσαι συλλήβδην τῶν γενητῶν ὕλαι τε καὶ συστάσεις· ἀλλ' ὁ ἄνθρωπος τοῦ Χριστοῦ, ἐκ νεκρῶν ἐγειρόμενος, ὑψοῦται καὶ δοξάζεται, τῶν ἐναντίων αἰσχύνην ἄντικρυς ἀραμένων. 34 Οἱ δὲ φθόνῳ τὸ μῖσος ἀράμενοι κατ' αὐτοῦ καὶ πεφραγμένοι πολεμίᾳ παρατάξει σκορπίζονται, τοῦ Λόγου τε καὶ Θεοῦ τὸν ἑαυτοῦ ναὸν ἀξιοπρεπῶς ἀναστήσαντος.