What does the Bible say about being wholehearted?

Such is the text, and now we come to the exposition. Moses sums up in two brief sentences what the law implies in its first table. First, the unity and immutability of God: "Jehovah our God is one Jehovah" founded upon this, His claim to the undivided allegiance of man, — "Thou shalt love Jehovah thy God with all thy heart, and with all thy soul, and with all thy might." If there be but one God, there is none beside to divide the heart with; and Jehovah claims in the most absolute way the whole of it. The words stand for the inner man, with all his affections, and in their full energy. And this is the reasonable claim of the Creator to the full answer of the heart to Him who created him, and in whose service alone all his faculties find their full occupation, rest, and satisfaction. All freedom apart from this is only slavery. All slavery here is only freedom as he knew well who could say, "To me, to live is Christ," and who in his epistle to the Romans signs himself His "bondsman," — "Paul, bondsman of Jesus Christ." (Rom. 1:1, Greek.) Yet none can insist more earnestly that "we have not received the spirit of bondage." (Rom. 8:15.) To live in love, and serve Him who is love, is indeed the opposite.

"Jehovah, our Elohim is one Jehovah," thus the name of God is used in this verse. The verse states that to Him alone the name of Jehovah (the Self-existing One) rightfully belongs, He is the one who is absolutely God. It is the testimony against the polytheism (many and different gods) of the Gentiles, which surrounded Israel on all sides. And therefore, because He is the one God, and none beside Him, He must be loved with all the heart, with all the soul, with all the might. The heart with all its affections and energies must belong to Him. To believe on Him and to know Him must ever result in giving Him the heart. Spirit, soul and body must be devoted to Him. This is the first and the great commandment (Matthew 22:38; Mark 12:29-30). And we know this Jehovah as our Redeemer, who came and died in our stead. The New Testament fully reveals the claims He has on those, for whose redemption He paid the price with His own blood. "We love Him, because He first loved us" (1 John 4:19). "And this commandment have we from Him, that he who loveth God love his brother also" (verse 21). "This is the love of God, that we keep His commandments" (1 John 5:3). "For ye are bought with a price; therefore, glorify God in your body, and in your spirit, which are God's" (1 Cor. 6:20).

Blessed fact! Blessed relationship! But Israel had to be reminded of the conduct suited to such a relationship — conduct which could only flow from a loving heart. "Thou shalt love the Lord thy God with all thy heart, and with all thy soul, and with all thy might." Here lies the secret of all true practical religion. Without this all is valueless to God. "My son, give me thine heart." Where the heart is given, all will be right. The heart may be compared to the regulator of a watch which acts on the hair-spring, and the hair-spring acts on the main-spring, and the main-spring acts on the hands, as they move round the dial. If your watch goes wrong, it will not do merely to alter the hands, you must touch the regulator. God looks for real heart-work, blessed be His Name! His word to us is, "My little children, let us not love in word, neither in tongue; but in deed and in truth."

"How, 0 Israel, The Lord our God is one" (v.4)! This is basic to every department of our lives as it was to Israel's. There is no division in the Godhead: therefore God is the absolute. He is absolute in truth, absolute in supremacy, absolute in authority. Since this is true, it is only right that Israel be told, "You shall love the Lord your God with all your heart, with all your soul, and with all your strength" (v.5). In Luke 10:25-27 a lawyer who tested the Lord quoted this verse (Deut.6:5) and added from Leviticus 19:18, "and your neighbor as yourself." However, Deuteronomy 5 confines itself to loving God, for this must come first. What a law was this! Who could dare to say that the one absorbing object of his heart and soul is God? -- and that his entire strength is devoted to God's pleasure? This law is a perfectly righteous one, but man in the flesh is totally incapable of obeying it. The Lord Jesus is the only one who has done so.

As the opening verses of Deuteronomy 6 reveal, Moses continued to enforce this fact on the minds and consciences of the people. And what would move them to keep all the laws and statutes that were set before them? Nothing indeed but faith which works by love. Hence in verse 5 we get the words which were referred to by our Lord, as recorded in Matthew 22:36-37, and which He called "the first and great commandment." Jehovah is One, in contrast with the many false gods of the heathen world, and If He be the supreme Object of love, obedience will surely follow. Now He had shown His love for Israel by all that He had done on their behalf and this should have drawn out their love toward Him. Yet of course they had not known the great display of God's love in the gift of His Son, as we have known it. We can indeed say, "We love Him, because He first loved us" (1 John 4:19), and we know the love displayed in surpassing degree. Still God had shown His love towards them as a people, as they are reminded in the next chapter. They should have loved Him in return.

One of the scribes who was listening perceived this, and he ventured to propound a question that they often debated amongst themselves, concerning the relative importance of the various commandments. The Lord's answer brushed aside all their elaborate arguments and quibbles as to one or other of the ten commandments by going straight to the word contained in Deuteronomy 6:4-5. Here was a commandment which brought within its scope all the other commandments. God demanded that He should be absolutely supreme in the affections of His creatures; if only He were so, all other things would fall into their right place. Here is the great master-commandment which governs everything.

The very fact that the law’s demand was love shows that it was God’s own nature which desired this; and that nature is love;—“God is love.” Nor does the law simply demand love from the whole heart as is sometimes said, but rather from the whole being! for we read, “Thou shalt love the Lord thy God with all thy heart, and with all thy soul, and with all thy mind, and with all thy strength: this is the first commandment. And the second is like, namely this, thou shalt love thy neighbour as thyself. There is none other commandment greater than these” (Mark 12:30-31). How encouragingly blessed and glorious then it is to know that what God’s own nature desired, He shall have in righteousness and holiness through the redeeming work of His Son, and in His eternal home He shall rejoice to have those who wholly love God! How glad are our hearts that He desires nothing less! How we bless His holy name that His perfectly proven love has produced love. What the law could not do, His love has done. “We have known and believed the love that God has to us. God is love;” and, “We love because He first loved us.” Love was desired and demanded, but being fully proved in the Son of God upon the cross, love has been procured responsively.

But the Lord having done what the Pharisees, adversaries of the Sadducees, could not do, the curiosity of the Pharisees is excited, and they were gathered together (v. 34) One among them questions the Lord; but his demand 'has for result that Jesus lays the true foundation of the law and the prophets, and then establishes clearly the situation of things, the question of the moment, as God regarded it. Which, asks the lawyer, is the great commandment in the law? A question much debated among the Jews, for whom each commandment had a special value, the observance of each of them gaining, as in an examination, so many good marks from God. The Lord seizes the occasion, offered in the ways of God, to establish the fundamental principles of the divine law. To love God with all the heart, such is the first commandment. The second is like it, Thou shalt love thy neighbour as thyself. All in man hung on these two things. It is the summary of what man ought to be, the root and the measure of human righteousness. It is not in any way a revelation of divine love; it is not at all a question of grace, nor of an open way for the sinner to come to God; but it is the perfect rule of what a man should be, a divine compendium of the substance of the law, the law on which the prophets insisted in seeking to recall the people to its observance.

If we look at the law, in its two grand divisions, it tells a man to love God with all his heart, and with all his soul, and with all his mind; and to love his neighbour as himself. This is the sum of the law. This, and not a tittle less, is what the law demands. But where has this demand ever been responded to by any member of Adam's fallen posterity? Where is the man who could say he loves God after such a fashion? "The carnal mind (i.e., the mind which we have by nature) is enmity against God." Man hates God and His ways. God came, in the Person of Christ, and showed Himself to man — showed Himself, not in the overwhelming brightness of His majesty, but in all the charm and sweetness of perfect grace and condescension. What was the result? Man hated God. "Now have they both seen and hated both me and my Father." (John 15:24.) But, it must be said, "Man ought to love God." No doubt, and he deserves death and eternal perdition if he does not. But can the law produce this love in man's heart? Was that its design? By no means, "for the law works wrath." The law finds man in a state of enmity against God; and without ever altering that state — for that was not its province — it commands him to love God with all his heart, and curses him if he does not. It was not the province of the law to alter or improve man's nature; nor yet could it impart any power to carry out its righteous demands. It said "This do, and thou shalt live." It commanded man to love God. It did not reveal what God was to man, even in his guilt and ruin; but it told man what he ought to be toward God. This was dismal work. It was not the unfolding of the powerful attractions of the divine character, producing in man true repentance toward God, melting his icy heart, and elevating his soul in genuine affection and worship. No: it was an inflexible command to love God; and, instead of producing love, it "worked wrath;" not because God ought not to be loved, but because man was a sinner.

The law falls into two sections: Your duty God-ward, and your duty manward. It demands that you should not merely conform to it in the outward observance of morality and uprightness, etc., but it demands that you should love God with ALL your heart, soul, strength, and mind (Luke 10:27). Now you don’t do it. No, you don’t do it.