My heart is {h} fixed, O God, my heart is fixed: {i} I will sing and give praise.

(h) That is, wholly bent to give you praise for my deliverance.

(i) He shows that both his heart will praise God, and his tongue will confess him, and also he will use other means to provoke himself forward to the same.

Wesley's Notes

57:7 Fixed - In a stedfast belief of thy promises.

King James Translators' Notes

fixed: or, prepared

Jamieson-Fausset-Brown Bible Commentary

7. I will . praise-both with voice and instrument.

Matthew Henry's Concise Commentary

57:7-11 By lively faith, David's prayers and complaints are at once turned into praises. His heart is fixed; it is prepared for every event, being stayed upon God. If by the grace of God we are brought into this even, composed frame of mind, we have great reason to be thankful. Nothing is done to purpose, in religion, unless it is done with the heart. The heart must be fixed for the duty, put in frame for it; fixed in the duty by close attention. Our tongue is our glory, and never more so than when praising God; dull and sleepy devotions will never be acceptable to God. Let us awake early in the morning, to begin the day with God; early in the beginning of a mercy. When God comes toward us with his favours, let us go forth to meet him with our praises. David desired to bring others to join in praising God; and in his psalms, he is still praising God among the people, singing to Him among the nations. Let us seek to have our hearts fixed to praise his boundless mercy and unfailing faithfulness; and to glorify him with body, soul, and spirit, which are his. Let us earnestly pray that the blessings of the gospel may be sent through every land.