Cease from thine own wisdom - i. e., "Cease from the use of what is in itself most excellent, if it only serves to seek after wealth, and so ministers to evil." There is no special contrast between "thine own wisdom" and that given from above, though it is of course implied that in ceasing from his own prudence the man is on the way to attain a higher wisdom.

Labour not to be rich - Let not this be thy object. Labour to provide things honest in the sight of God and all men; and if thou get wealth, do not forget the poor, else God's curse will be a canker even in thy gold.
Cease from thine own wisdom - בינתך binathecha, thy own understanding or prudence. The world says, "Get rich if thou canst, and how thou canst." Rem, si possis, recte; si non, quocunque modo rem; "Get a fortune honestly if thou canst; but if not, get one at all events." This is the devil's counsel, and well it is followed; but Solomon says, and God says, "Cease from thine own counsel." Thou hast an immortal soul, and shalt shortly appear before God. Lay up treasure for heaven, and be rich towards God.

Labour not to be rich: cease from thy own (d) wisdom.
(d) Bestow not the gifts that God has given you, to get worldly riches.

Labour not to be rich,.... In an immoderate over anxious way and manner, to a weariness, as the word (u) signifies, and even as to gape for breath men ought to labour, that they may have wherewith to support themselves and families, and give to others and: if they can, lay up for their children; but then persons should not toil and weary themselves to heap up riches when they know not who shall gather them and much less make use of indirect and illicit methods to obtain them; resolving to be rich at any rate: rather men should labour for durable riches, lay up treasure in heaven, seek those things which are above, and labour to be accepted of God both here and hereafter; which only is in Christ. The Targum is,
"do not draw nigh to a rich man;''
and so the Syriac version; to which agree the Septuagint and Arabic versions;
cease from thine own wisdom; worldly wisdom in getting; riches, as if this was the highest point of wisdom; do not be always laying schemes, forming projects, inventing new things in order to get money; or do not depend upon thine own wisdom and understanding and expect to be rich by means thereof; for bread is not always to the wise, nor riches to men of understanding, Ecclesiastes 9:11. The Targum is,
"but by thine understanding depart from him;''
the rich man; and to the same purpose the Syriac and Arabic versions.
(u) "ne fatiges", Mercerus, Junius & Tremellius; "ne hiascas", Schultens.

Be not of those that will be rich. The things of this world are not happiness and a portion for a soul; those that hold them ever so fast, cannot hold them always, cannot hold them long.

(Compare 1-Timothy 6:9-10).
thine own wisdom--which regards riches intrinsically as a blessing.

All the forms of proverbs run through these appended proverbs. There now follows a pentastich:
4 Do not trouble thyself to become rich;
Cease from such thine own wisdom.
5 Wilt thou let thine eyes fly after it, and it is gone?
For it maketh itself, assuredly it maketh itself wings,
Like an eagle which fleeth toward the heavens.
The middle state, according to Proverbs 30:8, is the best: he who troubleth himself (cf. Proverbs 28:20, hasteth) to become rich, placeth before himself a false, deceitful aim. יגע is essentially one with (Arab.) waji'a, to experience sorrow, dolere, and then signifies, like πονεῖν and κάμνειν, to become or to be wearied, to weary or trouble oneself, to toil and moil (Fleischer). The בּינה (cf. Proverbs 3:5) is just wisdom, prudence directed towards becoming rich; for striving of itself alone does not accomplish it, unless wisdom is connected with it, which is not very particular in finding out means in their moral relations; but is so much the more crafty, and, as we say, speculative. Rightly Aquila, the Venet., Jerome, and Luther: take not pains to become rich. On the contrary, the lxx reads אל תיגע להעשׁיר, stretch not thyself (if thou art poor) after a rich man; and the Syr. and Targ. אל תּגּע להעשׁיר, draw not near to the rich man; but, apart from the uncertainty of the expression and the construction in both cases, poetry, and proverbial poetry too, does not prefer the article; it never uses it without emphasis, especially as here must be the case with it not elided. These translators thought that 'בּו וגו, Proverbs 23:5, presupposed a subject expressed in Proverbs 23:4; but the subject is not העשׁיר, but the עשׁר [riches] contained in להעשׁיר. The self-intelligible it in "it maketh wings," etc. is that about which trouble has been taken, about which there has been speculation. That is a deceitful possession; for what has been gained by many years of labour and search, often passes away suddenly, is lost in a moment. To let the eyes fly after anything, is equivalent to, to direct a (flying) look toward it: wilt thou let thine eyes rove toward the same, and it is gone? i.e., wilt thou expose thyself to the fate of seeing that which was gained with trouble and craft torn suddenly away from thee? Otherwise Luther, after Jerome: Let not thine eyes fly after that which thou cast not have; but apart from the circumstance that בּו ואיננּוּ cannot possibly be understood in the sense of ad opes quas non potes habere (that would have required באשׁר איננו), in this sense after the analogy of (ל) נשׂא נפשׁ אל, the end aimed at would have been denoted by לו and not by בו. Better Immanuel, after Rashi: if thou doublest, i.e., shuttest (by means of the two eyelids) thine eyes upon it, it is gone, i.e., has vanished during the night; but עוף, duplicare, is Aram. and not Hebrews. Rather the explanation is with Chajg, after Isaiah 8:22.: if thou veilest (darkenest) thine eyes, i.e., yieldest thyself over to carelessness; but the noun עפעפּה shows that עוף, spoken of the eyes, is intended to signify to fly (to rove, flutter). Hitzig too artificially (altering the expression to להעשׁיר): if thou faintest, art weary with the eyes toward him (the rich patron), he is gone - which cannot be adopted, because the form of a question does not accord with it. Nor would it accord if ואיננו were thought of as a conclusion: "dost thou let thy look fly toward it? It is gone;" for what can this question imply? The ו of ואיננו shows that this word is a component part of the question; it is a question lla nakar, i.e., in rejection of the subject of the question: wilt thou cast thy look upon it, and it is gone? i.e., wilt thou experience instant loss of that which is gained by labour and acquired by artifice? On בו, cf. Job 7:8. 'עיניך וגו, "thou directest thine eyes to me: I am no more." We had in Proverbs 12:19 another mode of designating viz. till I wink again an instant. The Chethı̂b 'התעוּף וגו is syntactically correct (cf. Proverbs 15:22; Proverbs 20:30), and might remain. The Kerı̂ is mostly falsely accentuated התּעיף, doubly incorrectly; for (1) the tone never retreats from a shut syllable terminating in , e.g., להכין, Isaiah 40:20; בהכין, 1-Chronicles 1:4; אבין, Job 23:8; and (2) there is, moreover, wanting here any legitimate occasion for the retrogression of the tone; thus much rather the form התּעיף (with Mehuppach of the last, and Zinnorith of the preceding open syllable) is to be adopted, as it is given by Opitz, Jablonsky, Michaelis, and Reineccius.
The subject of 5b is, as of 5a, riches. That riches take wings and flee away, is a more natural expression than that the rich patron flees away - a quaint figure, appropriate however at Nahum 3:16, where the multitude of craftsmen flee out of Nineveh like a swarm of locusts. עשׂה has frequently the sense of acquirere, Genesis 12:5, with לו, sibi acquirere, 1-Samuel 15:1; 1-Kings 1:15; Hitzig compares Silius Ital. xvi. 351: sed tum sibi fecerat alas. The inf. intensivus strengthens the assertion: it will certainly thus happen.
In 5c all unnecessary discussion regarding the Chethı̂b ועיף is to be avoided, for this Chethı̂b does not exist; the Masora here knows only of a simple Chethı̂b and Kerı̂, viz., ועוּף (read יעוּף), not of a double one (ועיּף), and the word is not among those which have in the middle a י, which is to be read like ו. The manuscripts (e.g., also the Bragadin. 1615) have ועוּף, and the Kerı̂ יעוּף; it is one of the ten words registered in the Masora, at the beginning of which a י is to be read instead of the written ו. Most of the ancients translate with the amalgamation of the Kerı̂ and the Chethı̂b: and he (the rich man, or better: the riches) flees heavenwards (Syr., Aquila, Symmachus, Theodotion, Jerome, and Luther). After the Kerı̂ the Venet. renders: ὡς ἀετὸς πτήσεται τοῖς οὐρανοῖς (viz., ὁ πλοῦτος). Rightly the Targ.: like an eagle which flies to heaven (according to which also it is accentuated), only it is not to be translated "am Himmel" [to heaven], but "gen Himmel" [towards heaven]: השּׁמים is the accusative of direction - the eagle flies heavenward. Bochart, in the Hierozocon, has collected many parallels to this comparison, among which is the figure in Lucian's Timon, where Pluto, the god of wealth, comes to one limping and with difficulty; but going away, outstrips in speed the flight of all birds. The lxx translates ὥσπερ ἀετοῦ καὶ ὑποστρέφει εἰς τὸν οἶκον τοῦ προεστηκότος αὐτοῦ. Hitzig accordingly reads שׁבו לבית משׂגּבּו, and he (the rich patron) withdraws from thee to his own steep residence. But ought not οἶκος τοῦ προεστηκότος αὐτοῦ to be heaven, as the residence of Him who administers wealth, i.e., who gives and again takes it away according to His free-will?

Thine own wisdom - From worldly wisdom, which persuades men to use all possible means to get riches.