Whoso is wise, and will observe these things, even they shall understand the lovingkindness of the LORD.
To think rightly of God we must conceive of Him as being altogether boundless in His goodness, mercy, love, grace, and in whatever else we may properly attribute to the Deity.
Since God is infinite, whatever He is must be infinite, also; that is, it must be without any actual or conceivable limits. The moment we allow ourselves to think of God as having limits, the one of whom we are thinking is not God but someone or something less than and different from Him.
It is not enough that we acknowledge God’s infinite resources; we must believe also that He is infinitely generous to bestow them!
The first is not too great a strain on our faith. Even the deist will admit that the Most High God, possessor of heaven and earth, must be rich beyond the power of man to conceive. But to believe that God is a giver as well as a possessor takes an advanced faith and presupposes that there has been a divine revelation to that effect which gives validity to our expectations. Which indeed there has been—we call this revelation the Bible!
Believing all this, why are we Christians so poverty-stricken? I think it is because we have not learned that God’s gifts are meted out according to the taker, not according to the giver!
Though almighty and all-wise, God yet cannot pour a great gift into a small receptacle!
43 The conclusion to this psalm transforms the hymn of thanksgiving and praise to a wisdom psalm. The righteous will become wise by studying the acts of the Lord in human affairs. Even in adversity, the righteous person learns to know God better and to trust that he will make all things well. His acts of love (NIV, “the great love”) are constant. The fool rages against God, but the wise will keep these things in the heart.
107:43 Perhaps the psalmist has Pr 8:1–36, Ecc 12:13, 14, or Hos 14:9 in mind as he pens these concluding words.
107:43 Let the Wise Attend to These Things. The final verse closes by inviting whoever is wise (i.e., those who genuinely seek to be skillful in godly living; see Introduction to Proverbs: Character Types in Proverbs) to attend to these things, specifically, to the many ways in which God has displayed his steadfast love. Such a meditation will increase one’s wisdom.
107:43 wise Wisdom in the ot refers to knowing and observing God’s commands with reverence. See note on Ps 104:24.
let them consider The psalmist implies that the key to wisdom is a steady focus on Yahweh’s steadfast love. God is just, but also merciful, so loyalty to Him and His law is truly wise.
107:43 Whoever is wise. The retelling of the history of Israel is for a purpose: to learn from it the steadfast love of God 
 Tozer, A. W., & Smith, G. B. (2015). Evenings with tozer: daily devotional readings. Chicago, IL: Moody Publishers.
 VanGemeren, W. A. (2008). Psalms. In T. Longman III & D. E. Garland (Eds.), The Expositor’s Bible Commentary: Psalms (Revised Edition) (Vol. 5, p. 802). Grand Rapids, MI: Zondervan.
 MacArthur, J. F., Jr. (2006). The MacArthur study Bible: New American Standard Bible. (Ps 107:43). Nashville, TN: Thomas Nelson Publishers.
 Crossway Bibles. (2008). The ESV Study Bible (p. 1081). Wheaton, IL: Crossway Bibles.
 Barry, J. D., Mangum, D., Brown, D. R., Heiser, M. S., Custis, M., Ritzema, E., … Bomar, D. (2012, 2016). Faithlife Study Bible (Ps 107:43). Bellingham, WA: Lexham Press.
 Sproul, R. C. (Ed.). (2015). The Reformation Study Bible: English Standard Version (2015 Edition) (p. 961). Orlando, FL: Reformation Trust.