Fred, this OT verse is about YHWH not his Son.
What YHWH alone knows is used in reference to Jesus.
Therefore, Jesus is YHWH.
The Father and Son never do things independently from one another.Christ could not see the hearts of people independently.
He had to rely on the Spirit of his Father to discern
Thus, all there Persons are God. Thanks.
...to read the heart...as any genuine believer today can also at least discern in the same way on a general scale via the Spirit of God. I can!
Pride.
No, you can't.
You can't even fully know your own heart.
To fully know the hearts of all people (kardiognōstēs) is the same thing as being omniscient (= God).
1. New International Dictionary of New Testament Theology (NIDNTT): kardiognōstēs is unknown to secular Gk. and to the LXX, and occurs in the NT only in Acts 1:24 and 15:8 and later in patristic writings. It describes God as the knower of hearts. The fact that God sees, tests and searches the hidden depths of the human heart is commonly stated in both the OT and the NT (1 Sam. 16:7; Jer. 11:20; 17:9f.; Lk. 16:15; Rom. 8:27; 1 Thess. 2:4; Rev. 2:23). This belief in the omniscience of God is expressed succinctly by the adj. kardiognōstēs (2:183, Heart, T. Sorg).
2. Theological Dictionary of the New Testament (TDNT): The designation of God as ho kardiognōstēs , "the One who knows the heart," expresses in a single term (Ac. 1:24; 15:8) something which is familiar to both the NT and OT piety (Lk. 16:15; R. 8:27; 1 Th. 2:4 Rev. 2:23 of Christ, cf. 1 Bas. 16:7; 3 Bas. 8:39; 1 Par. 28:9; Psalm 7:9; Ier. 11:20; 17:10; Sir. 42:18 ff.), namely that the omniscient God knows the innermost being of every man where the decision is made either for Him or against Him (3:613, kardiognōstēs, Behm).
3. Exegetical Dictionary of the New Testament (EDNT): On the one hand God is "in heaven" (Matt 6:9f. par.; 7:11; 11:25) and strictly distinguishable from everything that is of this world. On the other hand, however, he is present (Matt 6:1-18; Rev 1:8) and omniscient (Matt 6:8, 32; Acts 1:24; 15:8) (2:141, theos, G. Schneider).
4. New International Dictionary of Old Testament Theology and Exegesis (NIDOTTE): the psalmist acknowledged the omniscience of God who knows the secrets of the heart (44:21[22]) (3:426, ta`alummah - hidden, secret, Andrew Hill).