Yes, this is, of course, an awesome text; but what about the cross? It doesn't mention the cross. And, what about mercy and forgiveness, faith and works, law and grace, righteousness and true holiness? Are these things too complicated to be included in your formula?

14 And as Moses lifted up the serpent in the wilderness, even so must the Son of Man be lifted up, 15 that whoever believes in Him should not perish but have eternal life. 16 For God so loved the world that He gave His only begotten Son, that whoever believes in Him should not perish but have everlasting life.(John 3:14-16)

Verse 14 implies the cross; but verse 16 doesn't.

14And as Moses lifted up the serpent in the wilderness, even so must the Son of man be lifted up:

15That whosoever believeth in him should not perish, but have eternal life.

16For God so loved the world, that he gave his only begotten Son, that whosoever believeth in him should not perish, but have everlasting life.

For God so loved the world, that he gave his only begotten Son, that whosoever believeth in him should not perish, but have everlasting life. John 3:16.

The heart of God yearns over His earthly children with a love stronger than death. In giving up His Son, He has poured out to us all heaven in one gift.

Through that gift there comes to us day by day the unfailing flow of Jehovah's goodness. Every flower, with its delicate tints and sweet fragrance, is given for our enjoyment through that one Gift. The sun and moon were made by Him; there is not a star that beautifies the heavens which He did not make. There is not an article of food upon our tables that He has not provided for our sustenance. The superscription of Christ is upon it all. Everything is supplied to man through the one unspeakable Gift, the only-begotten Son of God. He was nailed to the cross that all these bounties might flow to God's workmanship. (FILB 45)

The revelation of God's love to man centers in the cross. Its full significance tongue cannot utter, pen cannot portray, the mind of man cannot comprehend. Looking upon the cross of Calvary, we can only say, "God so loved the world that he gave his only begotten Son, that whosoever believeth in him should not perish, but have everlasting life" (John 3:16). (Reflecting Christ 33)

-Justification by faith is to many a mystery. A sinner is justified by God when he repents of his sins. He sees Jesus upon the cross of Calvary. Why all this suffering? The law of Jehovah has been broken. The law of God's government in heaven and earth has been transgressed, and the penalty of sin is pronounced to be death. But "God so loved the world, that he gave his only begotten Son, that whosoever believeth in him should not perish, but have everlasting life." Oh, what love, what matchless love! Christ, the Son of God, dying for guilty man! (3SM 193)

The revelation of God's love to men centers in the cross. Its full significance tongue cannot utter; pen cannot portray; the mind of man cannot comprehend. Looking upon the cross of Calvary we can only say: "God so loved the world, that He gave His only-begotten Son, that whosoever believeth in Him should not perish, but have everlasting life." John 3:16. (8T 287)

Also, it doesn't say anything about mercy and forgiveness, faith and works, law and grace, righteousness and true holiness. Are these things too complicated to be included in a formula?

And as Christ draws them to look upon His cross, to behold Him whom their sins have pierced, the commandment comes home to the conscience. The wickedness of their life, the deep-seated sin of the soul, is revealed to them. They begin to comprehend something of the righteousness of Christ, and exclaim, "What is sin, that it should require such a sacrifice for the redemption of its victim? Was all this love, all this suffering, all this humiliation, demanded, that we might not perish, but have everlasting life?"

The sinner may resist this love, may refuse to be drawn to Christ; but if he does not resist he will be drawn to Jesus; a knowledge of the plan of salvation will lead him to the foot of the cross in repentance for his sins, which have caused the sufferings of God's dear Son. (SC 27)

In every command or injunction that God gives there is a promise, the most positive, underlying the command. God has made provision that we may become like unto Him, and He will accomplish this for all who do not interpose a perverse will and thus frustrate His grace. (MB 76)

Isaiah
1:16 Wash you, make you clean; put away the evil of your doings from before mine eyes; cease to do evil;
1:17 Learn to do well; seek judgment, relieve the oppressed, judge the fatherless, plead for the widow.

2 Corinthians
7:1 Having therefore these promises, dearly beloved, let us cleanse ourselves from all filthiness of the flesh and spirit, perfecting holiness in the fear of God.

1 Peter
2:21 For even hereunto were ye called: because Christ also suffered for us, leaving us an example, that ye should follow his steps:
2:22 Who did no sin, neither was guile found in his mouth:

Romans
6:6 Knowing this, that our old man is crucified with [him], that the body of sin might be destroyed, that henceforth we should not serve sin.
6:7 For he that is dead is freed from sin.

John
3:14 And as Moses lifted up the serpent in the wilderness, even so must the Son of man be lifted up:
3:15 That whosoever believeth in him should not perish, but have eternal life.
3:16 For God so loved the world, that he gave his only begotten Son, that whosoever believeth in him should not perish, but have everlasting life.

Galatians
5:16 [This] I say then, Walk in the Spirit, and ye shall not fulfil the lust of the flesh.

1 Peter
4:1 Forasmuch then as Christ hath suffered for us in the flesh, arm yourselves likewise with the same mind: for he that hath suffered in the flesh hath ceased from sin;
4:2 That he no longer should live the rest of [his] time in the flesh to the lusts of men, but to the will of God.

1 John
3:6 Whosoever abideth in him sinneth not: whosoever sinneth hath not seen him, neither known him.
3:7 Little children, let no man deceive you: he that doeth righteousness is righteous, even as he is righteous.
3:8 He that committeth sin is of the devil; for the devil sinneth from the beginning. For this purpose the Son of God was manifested, that he might destroy the works of the devil.
3:9 Whosoever is born of God doth not commit sin; for his seed remaineth in him: and he cannot sin, because he is born of God.

1. The love of God, as demonstrated by the death of Jesus, motivates us to cease to do evil.

2. The love of God, as demonstrated by the life of Jesus, motivates us to learn to do well.