Teach me goodness of taste and acknowledge After having confessed that he had found, by experience, the faithfulness of God to his promises, David here adds a request similar to what is contained in the 64th verse, namely, that he may grow in right understanding; although the phraseology is somewhat different; for instead of thy statutes, as in that verse, he here uses goodness of taste and knowledge. As the verb tm taam, signifies to taste, the noun which is derived from it properly denotes taste It is, however, applied to the mind. David, there is no doubt, prays that knowledge, accompanied with sound discretion and judgment, might. be imparted to him. Those who read, disjunctively, goodness and taste, mar the whole sentence. It is, however, necessary, in order to our arriving at the full meaning, that the latter clause should be added. He asserts that he believed God's commandments, in other words, that he cheerfully embraced whatever is prescribed in the law; and thus he describes himself as docile and obedient. As it was by the guidance of the Holy Spirit that he became thus inclined to obedience, he pleads that another gift may be bestowed upon him -- the gift of a sound taste and good understanding. Whence we learn, that these two things, right affection and good understanding, are indispensably necessary to the due regulation of the life. The prophet already believed God's commandments; but his veneration for the law, proceeding from a holly zeal, led him to desire conformity to it, and made him afraid, and not without cause, of inconsiderately going astray. Let us then learn, that after God has framed our hearts to the obedience of his law, we must, at the same time, ask wisdom from him by which to regulate our zeal.

Teach me good judgment - The word here rendered "judgment" means, properly, "taste," that power by which we determine the quality of things as sweet, bitter, sour, etc. Then it is applied to the mind or understanding, as that by which we determine the moral quality of things, or decide what is right or wrong; wise or foolish; good or evil. Here it means that he desired to have in full exercise the faculty of appreciating what is right, and of distinguishing it from what is wrong.
And knowledge - Knowledge of the truth; knowledge of thy will; knowledge of duty.
For I have believed thy commandments - I have confided in thy commandments. He believed that such a keeping of the law of God would be connected with a correct view of things. The keeping of the commands of God is one of the best means of growing in true knowledge, and of cultivating the understanding; of promoting a just taste or perception of what is true, and of developing the powers of the soul in the best proportions. Compare John 7:17.

Teach me good judgment and knowledge - טוב טעם ודעי למדני tob taam vedaath lammnedeni. Teach me (to have) a good taste and discernment. Let me see and know the importance of Divine things, and give me a relish for them.

Teach me good judgment and knowledge,.... Or, "a good taste" (p): of the Lord himself, how good and gracious he is; of his grace and love, which is better than wine; of his word and the truths of it, which are sweeter to a spiritual taste than honey or the honeycomb; and of the things of the Spirit of God, which are seventy to a spiritual man, a distinguishing taste of things; for as "the taste discerns perverse things" in food, so a man of a spiritual taste distinguishes good from evil, truth from error; discerns things that differ, and approves of those that are most excellent, and abides by them. Or, "a good sense" (q), as it may be rendered; a good sense of the Scriptures, the true and right sense of them; and to have the mind of God and of Christ, and of the Spirit of Christ, in the word; and to have distinguishing light in it, and a well established judgment in the truths of it, is very desirable: as is also a spiritual and experimental "knowledge" of them, a growing and increasing one; a knowledge of God in Christ, and of his will; a knowledge of Christ, his person and offices, and the mysteries of his grace; which a truly gracious and humble soul desires to be taught, and is taught of God more or less;
for I have believed thy commandments; the whole word of God, and all that is said in it; that it is of God, is the word of God and not the word of man; and therefore he was desirous of being taught the true meaning of it, and to be experimentally acquainted with it; the word of God is called his commandment, Psalm 19:7. Or the precepts of the word; he believed these were the commandments of God, and not of men; delivered out by him, and enforced by his authority; and therefore he gave credit to them, and loved them, and desired better to understand and do them: or the promises and threatenings annexed to them, which he believed would be punctually fulfilled upon the doers or transgressors of them; and as for himself, he cheerfully yielded the obedience of faith unto them.
(p) "bonitatem gustus", Piscator, Michaelis. (q) "Bonitatem sensus", Montanus; i.e. "sensum bonum", Gejerus.

Teach me good judgment and knowledge--namely, in Thy word (so as to fathom its deep spirituality); for the corresponding expression (Psalm 119:12, Psalm 119:64, Psalm 119:68), is, "Teach me Thy statutes."

Judgment - Whereby I may rightly discern between truth and falsehood. Knowledge - A spiritual experimental knowledge.