Prov 16:9

“Man is here represented to us, 1. As a reasonable creature, that has the faculty of contriving for himself: His heart devises his way, designs an end, and projects ways and means leading to that end, which the inferior creatures, who are governed by sense and natural instinct, cannot do. The more shame for him if he do not devise the way how to please God and provide for his everlasting state. 2. But as a depending creature, that is subject to the direction and dominion of his Maker. If men devise their way, so as to make God's glory their end and his will their rule, they may expect that he will direct their steps by his Spirit and grace, so that they shall not miss their way nor come short of their end. But let men devise their worldly affairs ever so politely, and with ever so great a probability of success, yet God has the ordering of the event, and sometimes directs their steps to that which they least intended. The design of this is to teach us to say, If the Lord will, we shall live and do this or that (Jam 4:14, Jam 4:15), and to have our eye to God, not only in the great turns of our lives, but in every step we take. Lord, direct my way, Th1 3:11.”

“A man's heart deviseth his way,.... This is to be understood, not of a wicked man, in whose heart is frowardness, and who devises mischief and evil imaginations continually, Pro 6:14; for such are an abomination to the Lord; nor will he direct their goings, or prosper and succeed them in their ways: but of a good man, or righteous man, as Aben Ezra; who thinks of the way in which he should go, and desires to walk in a right way, as Jarchi; and who is influenced by the Spirit and grace of God to think and act in this manner; for otherwise the way of man is not in himself; it is not of his own devising and finding out; nor is his disposition to walk in it of himself; and it is only such a man, a good man, whose steps are ordered by the Lord, as follows; see Jer 10:23; but the Lord directeth his steps: to go right on, and not turn to the right hand or the left; and to walk safely and surely, through a variety of troubles and difficulties, to his kingdom and glory.”

“9 The heart of man deviseth his way; But Jahve directeth his steps. Similar to this is the German proverb: "Der Mensch denkt, Gott lenkt" [= our "man proposes, God disposes"], and the Arabic el-‛abd (העבד = man) judebbir wallah juḳaddir; Latin, homo proponit, Deus disponit; for, as Hitzig rightly remarks, 9b means, not that God maketh his steps firm (Venet., Luther, Umbreit, Bertheau, Elster), but that He gives direction to him (Jerome, dirigere). Man deliberates here and there (חשּׁב, intens. of חשׁב, to calculate, reflect) how he will begin and carry on this or that; but his short-sightedness leaves much out of view which God sees; his calculation does not comprehend many contingencies which God disposes of and man cannot foresee. The result and issue are thus of God, and the best is, that in all his deliberations one should give himself up without self-confidence and arrogance to the guidance of God, that one should do his duty and leave the rest, with humility and confidence, to God.”