Make me understand the way of Your precepts, So I will meditate on Your wonders.
NASB95
Make me understand the way of your precepts, and I will meditate on your wondrous works.
ESV
Make me to understand the way of thy precepts: so shall I talk of thy wondrous works.
KJV

Notice the reiterated cries of the man of God for heavenly light, Teach me Your statutes—make me to understand the way of Your precepts. The need and the encouragement for these cries is equally manifest. Who has ever been known to understand the way of himself? And to whom—walking in a well-ordered conversation—has the Lord ever failed to show it? A man, untaught by the Spirit of God, may be able to criticize, and even clearly to expound, much of the word of God. But such a prayer as this has never ascended from the heart; the necessity of it has never been felt. And, doubtless, from this neglect of prayer have arisen those floating fancies and false and unscriptural doctrines, which crude, unexercised minds have too hastily embraced. Instead of humbly and simply asking, "Make me to understand"—men too often "lean to their own understanding," and are "vainly puffed up" by their fleshly mind, "not holding the Head." Such men may obtain loose fragments of spiritual knowledge; but they will not be in the faith, "grounded and settled." They never know when they are upon safe ground; and being "unlearned and unstable, they wrest the Scriptures"—except the sovereign grace of God interpose, "unto their own destruction."

Never must we forget, that teaching from above is indispensable to a right knowledge of the most simple truths. Ignorance and prejudice pervert the understanding. "Spiritual things can only be spiritually discerned." Divine doctrines can only be apprehended by Divine light. But under heavenly teaching, the deeper and more mysterious truths (so far as they are needful to be understood) are manifested with the same clearness, as the more elementary doctrines: "Eye has not seen nor ear heard, nor have entered into the heart of man, the things which God has prepared for them that love Him. But God has revealed them to us by His Spirit. Now we have received—not the spirit of the world, but the Spirit which is of God, that we might know the things that are freely given to us of God."

Wondrous, indeed, is the spiritual revelation in the knowledge of Himself; including "the hope of His calling;—the riches of the glory of His inheritance in His saints;—the exceeding greatness of His power" manifested to, and wrought in, His people;—no other or less than that "which He wrought in Christ, when He raised Him from the dead." In the understanding of the way, we would be progressing until the new man "grows up into the measure of the stature of the fullness of Christ." The smallest attainment in this knowledge is (as the great day will fully declare) of infinitely greater value than the highest intelligence in the field of earthly science.

But how important is it to grow in this knowledge! Theoretical attainment is at a stand. Spiritual and practical knowledge is always advancing. Little, indeed, comparatively, is necessary for salvation. But much for comfort and steadfastness—much also for the clear discernment of that narrow way of the precepts so difficult to trace, and when traced so difficult to maintain. Not less important is it to keep the object in constant view. Why do I desire to understand that way? That I may commend it to others—that I may talk of Your wondrous works. Abhorred be the thought of indulging in a self-complacent view of my attainments! But oh! let my God be more admired by me, and glorified in me. And may I advance both myself and others in His obedience and praise!

Often do we complain of restraint in religious conversation. But the prayer—Make me to understand while I talk—will bring "a live coal to our lips" from the altar of God, "Our mouths will then speak out of the abundance of the heart," and "minister grace to the hearers." Humility, teachableness, simplicity, will bring light into the understanding, influence the heart, "open the lips," and unite every member that we have in the service and praise of God.

"Make me to understand the way of your precepts." Give me a deep insight into the practical meaning of your word; let me get a clear idea of the tone and tenor of your law. Blind obedience has but small beauty; God would have us follow him with our eyes open. To obey the letter of the word is all that the ignorant can hope for: if we wish to keep God's precepts in their spirit we must come to an understanding of them, and that can be gained nowhere but at the Lord's hands. Our understanding needs enlightenment and direction: he who made our understanding must also make us understand. The last sentence was, "teach me your statutes," and the words, "make me to understand," are an instructive enlargement and exposition of that sentence: we need to be so taught that we understand what we learn. It is to be noted that the Psalmist is not anxious to understand the prophecies, but the precepts, and he is not concerned about the subtleties of the law, but the commonplaces and everyday rules of it, which are described as "the way of your precepts."

"So shall I talk of your wondrous works." It is ill talking of what we do not understand. We must be taught of God until we understand, and then we may hope to communicate our knowledge to others with a hope of profiting them. Talk without intelligence is mere talk, and idle talk; but the words of the instructed are as pearls which adorn the ears of them that hear. When our heart has been opened to understand, our lips should be opened to impart knowledge; and we may hope to be taught ourselves when we feel in our hearts a willingness to teach the way of the Lord to those among whom we dwell.

"Your wondrous works" Remark that the clearest understanding does not cause us to cease from wondering at the ways and works of God. The fact is, that the more we know of God's doings the more we admire them, and the more ready we are to speak upon them. Half the wonder in the world is born of ignorance, but holy wonder is the child of understanding. When a man understands the way of the divine precepts he never talks of his own works, and as the tongue must have some theme to speak upon, he begins to extol the works of the all-perfect Lord.

Some in this place read "meditate" or "muse" instead of "talk"; it is singular that the words should be so near of kin, and yet it is right that they should be, for none but foolish people will talk without thinking. If we read the passage in this sense, we take it to mean that in proportion as David understood the word of God he would meditate upon it more and more. It is usually so; the thoughtless care not to know the inner meaning of the Scriptures, while those who know them best are the very men who strive after a greater familiarity with them, and therefore give themselves up to musing upon them.

Observe the third verse of the last eight (19; and see how the sense is akin to this. In that place he described himself as a stranger in the earth, and here he prays to know his way; there, too, he prayed that the word might not be hid from himself, and here he promises that he will not hide it from others.