12 The renewed commitment also finds expression in acts and words of praise to the Lord. The psalmist’s wholehearted praise (cf. 9:1; 18:49) consists in a verbal expression of gratitude and acts of obeisance and gratitude to the Lord, as expressed by the phrase “I will glorify” (cf. “they will bring glory,” v. 9; see Reflections, p. 505, The Praise of Yahweh).
12. I will praise thee, O Lord my God! David engages, when he shall have experienced God to be in all respects a beneficent Father, to yield to him the tribute of gratitude. He expressed in the preceding verse a desire to have his heart united to God, that he might fear him; and now he affirms it to be his resolution to publish or celebrate his praises, not only with the mouth or tongue, but also with sincere affection of heart; yea, even to continue with stedfast perseverance in that exercise.