I will speak - That is, in my acts of praise. I will not be ashamed to be known as his worshipper; I will publicly declare my belief in his existence, his greatness, his goodness.
Of the glorious honor of thy majesty - The glory of the honor of thy majesty. This accumulation of epithets shows that the heart of the psalmist was full of the subject, and that he labored to find language to express his emotions. It is beauty; it is glory; it is majesty: it is all that is great, sublime, wonderful - all combined - all concentrated - in one Being.
And of thy wondrous works - Margin, "things," or "words." The reference is to wondrous deeds or acts considered as the subject of discourse or praise.

I will speak of the glorious honour of thy majesty,.... Of the majesty of the divine Person of Christ; of the honour due unto him; of the glory of him as of the only begotten of the Father, as he is the brightness of his glory, and the express image of his person; of his glory as Mediator, and the honour that belongs to him as such, with which he is now crowned at the right hand of the Majesty on high, angels, authorities, and powers, being subject unto him as the Lord and King of glory;
and of thy wondrous works; in becoming incarnate, in dying for the sins of his people, in rising from the dead the third day, in ascending to heaven and receiving gifts for men; in pouring down the spirit on them, in governing his church throughout all ages of the world, and judging the world at last.

I will speak--or, "muse" (Psalm 77:12; Psalm 119:15).
thy wondrous works--or, "words of thy wonders," that is, which described them (Psalm 105:27, Margin).