Приповісті 16:2

2 Every way of a man is pure in his own eyes; But a weigher of the spirits is Jahve. Variations of this verse are Pro 21:2, where ישׁר for זך (according to the root-meaning: pricking in the eyes, i.e., shining clear, then: without spot, pure, vid., Fleischer in Levy's Chald. Wrterbuch, i. 424), לבּות for רוּחות, and כּל־דּרך for כּל־דּרכי, whereupon here without synallage (for כל means the totality), the singular of the pred. follows, as Isa 64:10; Eze 31:15. For the rest, cf. with 2a, Pro 14:12, where, instead of the subj. בּעיני, is used לפני, and with 2b, Pro 24:12, where God is described by תּכן לבּות. The verb תּכן is a secondary formation from כּוּן (vid., Hupfeld on Psa 5:7), like תּכן from Arab. tyaḳn (to be fast, sure), the former through the medium of the reflex. התכּונן, the latter of the reflex. Arab. âitḳn; תּכן means to regulate (from regula, a rule), to measure off, to weigh, here not to bring into a condition right according to rule (Theodotion, ἑδράζων, stabiliens, Syr. Targ. מתקּן, Venet. καταρτίζει; Luther, "but the Lord maketh the heart sure"), but to measure or weigh, and therefore to estimate rightly, to know accurately (Jerome, spiritum ponderator est Dominus). The judgment of a man regarding the cause of life, which it is good for him to enter upon, lies exposed to great and subtle self-deception; but God has the measure and weight, i.e., the means of proving, so as to value the spirits according to their true moral worth; his investigation goes to the root (cf. κριτικός, Heb 4:12), his judgment rests on the knowledge of the true state of the matter, and excludes all deception, so that thus a man can escape the danger of delusion by no other means than by placing his way, i.e., his external and internal life, in the light of the word of Go…

Note, 1. We are all apt to be partial in judging of ourselves: All the ways of a man, all his designs, all his doings, are clean in his own eyes, and he sees nothing amiss in them, nothing for which to condemn himself, or which should make his projects prove otherwise than well; and therefore he is confident of success, and that the answer of the tongue shall be according to the expectations of the heart; but there is a great deal of pollution cleaving to our ways, which we are not aware of, or do not think so ill of as we ought. 2. The judgment of God concerning us, we are sure, is according to truth: He weighs the spirits in a just and unerring balance, knows what is in us, and passes a judgment upon us accordingly, writing Tekel upon that which passed our scale with approbation - weighed in the balance and found wanting; and by his judgment we must stand or fall. He not only sees men's ways but tries their spirits, and we are as our spirits are.

16:2 God’s moral evaluation is what counts (see Gen 8:21; 1 Sam 13:14; 16:6-7; Luke 16:15). This proverb is repeated almost verbatim in Prov 21:2.