(5) I will speak.--Or, perhaps, sing. The verb is often rendered meditate (Psalm 77:12; Psalm 119:15, &c.):

Thy wondrous works.--Rather, as in Psalm 105:27 (see Note; comp. Psalm 65:3), the details of thy wonders. In psalms like 105, 106, &c, is the detailed fulfilment of this purpose.

Verse 5. - I will speak of the glorious honor of thy majesty, and of thy wondrous works (comp. Psalm 26:7; Psalm 71:17). It was the duty of every faithful Israelite to set forth God's majesty, and to "declare his works with rejoicing" (Psalm 117:2). David proclaims himself ready to perform this duty. Then, he thinks, others will join in.

145:1-9 Those who, under troubles and temptations, abound in fervent prayer, shall in due season abound in grateful praise, which is the true language of holy joy. Especially we should speak of God's wondrous work of redemption, while we declare his greatness. For no deliverance of the Israelites, nor the punishment of sinners, so clearly proclaims the justice of God, as the cross of Christ exhibits it to the enlightened mind. It may be truly said of our Lord Jesus Christ, that his words are words of goodness and grace; his works are works of goodness and grace. He is full of compassion; hence he came into the world to save sinners. When on earth, he showed his compassion both to the bodies and souls of men, by healing the one, and making wise the other. He is of great mercy, a merciful High Priest, through whom God is merciful to sinners.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.