the heart · noun, common masculine singular construct + pronominal suffix
fixed
נָ֘כ֤וֹןna.Khon
H3559
properly · verb, niphal active participle, masculine singular absolute
God
אֱ֭לֹהִים'E.lo.Him
H430
gods in the ordinary sense · noun, common masculine plural absolute
heart
לִבִּ֑יli.Bi
H3820
the heart · noun, common masculine singular construct + pronominal suffix
fixed
נָכ֣וֹןna.Khon
H3559
properly · verb, niphal active participle, masculine singular absolute
sing
אָ֝שִׁ֗ירָה'a.Shi.rah
H7891
to sing · verb, qal infinitive construct, 1st person common singular
praise
וַאֲזַמֵּֽרָהva.'a.za.Me.rah
H2167
play upon it · conjunction + verb, piel infinitive construct, 1st person common singular
Strong's Exhaustive Concordance (James Strong, 1890/1894), public domain; digitized by Open Scriptures (CC BY-SA). KJV word tagging: eBible.org (public domain). Original-language text, parsing and brief lexicon: STEPBible.org data from Tyndale House, Cambridge (CC BY 4.0).
Cross-references
Psalms 112:7 He shall not be afraid of evil tidings: his heart is fixed, trusting in the LORD.
Ephesians 5:20 Giving thanks always for all things unto God and the Father in the name of our Lord Jesus Christ;
Psalms 34:4 I sought the LORD, and he heard me, and delivered me from all my fears.
Romans 5:3 And not only so, but we glory in tribulations also: knowing that tribulation worketh patience;
Psalms 108:1-5 O God, my heart is fixed; I will sing and give praise, even with my glory.
Isaiah 24:15 Wherefore glorify ye the LORD in the fires, even the name of the LORD God of Israel in the isles of the sea.
Cross-references from OpenBible.info (CC BY), in the lineage of the Treasury of Scripture Knowledge (public domain).
Commentary
Matthew Henry on Psalms 57:7–end
How strangely is the tune altered here! David's prayers and complaints, by the lively actings of faith, are here, all of a sudden, turned into praises and thanksgivings; his sackcloth is loosed, he is girded with gladness, and his hallelujahs are as fervent as his hosannas. This should make us in love with prayer, that, sooner or later, it will be swallowed up in praise. Observe,
I. How he prepares himself for the duty of praise (Psa 57:7): My heart is fixed, O God! my heart is fixed. My heart is erect, or lifted up (so some), which was bowed down, Psa 57:6. My heart is fixed, 1. With reference to God's providences; it is prepared for every event, being stayed upon God, Psa 112:7; Isa 26:3.…
I will . . . praise--both with voice and instrument.
John Gill on Psalms 57:7
My heart is fixed, O God,.... Firm and sure, trusting in the Lord, believing that he should be saved by him out of his troubles; see Psalm 101:1. So, in a spiritual sense, a heart fixed and established, or that is firm and sure, is one that is assured of its salvation by Christ, rooted and grounded in the love of God, firmly built on the foundation, Christ, and has its affections set on him; and is unmoved, from the hope of the Gospel, and the doctrines of it, by whatsoever it meets with in the world. It may be rendered, "my heart is prepared", or "ready" (r); that is, according to some, to receive good or evil, prosperity or adversity, at the hand of God; to which sense is Jarchi's note,
"…
Psalm 57:7-11
7. My heart is prepared, O God! my heart is prepared: I will sing, and give praise. 8. Awake up, my tongue: awake, psaltery and harp: I myself shall be awaked [343] at dawn of day. 9. I will praise thee, O Lord! among the peoples: I will sing unto thee among the nations. 10. For thy mercy is great unto the heavens, and thy truth unto the clouds. 11. Be thou exalted, O God! above the heavens: let thy glory be above all the earth.
7. My heart is prepared, O God! [344] Some read fixed, or confirmed, and the Hebrew word nkvn, nacon, bears that signification as well as the other. If we adopt it, we must understand David as saying that he had well and duly meditated upon the praise…
The Church Fathers
...Let your Love see the Lord speaking to us, and exhorting us by His example: "A trap they have prepared for My feet, and have bowed down My Soul" [Psalm 57:7]. They wished to bring It down as if from Heaven, and to the lower places to weigh It down: "They have bowed My Soul: they have digged before My face a pit and themselves have fallen into it." Me have they hurt, or themselves? Behold He hath been exalted above the Heavens, God, and behold above all the earth the Glory of the Same: the kingdom of Christ we see, where is the kingdom of the Jews? Since therefore they did that which to have done they ought not, there hath been done in their case that which to have suffered they ought: themselves have dug a ditch, and themselves have fallen into it. For their persecuting Christ, to Christ did no hurt, but to themselves did hurt. And do not suppose, brethren, that themselves alone hath this befallen. Every one that prepareth a pit for his brother, it must needs be that himself fall into it. ...
Our Lord Jesus Christ gave great assurance to his witnesses, that is, to the martyrs who, on account of their human weakness, were worried that perhaps they would perish after death if they died while confessing him. He did this by telling them, "Not a hair of your head will be harmed." Are you, whose hair will not be harmed, afraid of perishing? If inconsequential things in your life are protected in this way, under how much protection is your soul? A hair, which you do not feel when it is cut, does not perish; does the soul, through which you feel, perish? To be sure, he foretold that they were going to suffer many difficult circumstances, in order that by his prediction he might make them stronger. They said, then, to him, "My heart is steadfast." What does this mean, "My heart is steadfast," except that my will is strong? In their martyrdom the martyrs had their will steadfast, but "their will was made steadfast by the Lord." As they thought about the future harsh and difficult evils, he added, "By patient endurance you will save your lives." By patient endurance, he said, for patient endurance would not be there if your will were not in it. "In patient endurance," but where does ours come from? Both what we possess and what is given to us are ours, for if it were not ours, it would not be given to us. How do you give something to another, unless it comes to belong to the one to whom you are giving it? That confession is revealed: "Will not my soul be subject to God? For from him comes my patience." He himself tells us, "In patient endurance." Let us also say to him, "From him comes my hope." He made it yours by giving it to you; do not be ungrateful by attributing it to yourself.
Dictionary and topics
Altaschith — Destroy not, the title of Ps. 57, 58, 59, and 75. It was probably the name of some song to the melody of which these psalms were to be chanted.
Afflicted Saints · Should praise God — Should praise God
Heart, Character Of The Renewed · Fixed on God — Fixed on God
Dictionary: Easton's (1897) and Smith's (1863), public domain. Topics: Nave's Topical Bible (1896) and Torrey's Topical Textbook (1897), public domain. Both as parsed by NEUU (CC BY 4.0).
In this second half of the Psalm the poet refreshes himself with the thought of seeing that for which he longs and prays realized even with the dawning of the morning after this night of wretchedness. The perfect in Psa 57:7 is the perfect of certainty; the other perfects state what preceded and is now changed into the destruction of the crafty ones themselves. If the clause כּפף נפשׁי is rendered: my soul was bowed down (cf. חלל, Psa 109:22), it forms no appropriate corollary to the crafty laying of snares. Hence kpp must be taken as transitive: he had bowed down my soul; the change of number in the mention of the enemies is very common in the Psalms relating to these trials, whether it be…
This section is repeated with a few modifications in 108:1-5.
57:7-8 The psalmist is confident that God will end the night of evil (cp. 56:13).
Spurgeon's Treasury of David on Psalms 57:7
My heart is fixed, O God, my heart is fixed: I will sing and give praise.
My heart is fixed. One would have thought he would have said, "My heart is fluttered; "but no, he is calm, firm, happy, resolute, established. When the central axle is secure, the whole wheel is right. If our great bower anchor holds, the ship cannot drive. O God, my heart is fixed. I am resolved to trust thee, to serve thee, and to praise thee. Twice does he declare this to the glory of God who thus comforts the souls of his servants. Reader, it is surely well with thee, if thy once roving heart is now firmly fixed upon God and the proclamation of his glory. I will sing and give praise. Vocally and instrumentally wil…