God is love, is understood by His character, not an empty shell of a definition which is a wax nose, twisted to any shape one desires.
Exo 33:12 And Moses said unto the LORD, See, thou sayest unto me, Bring up this people: and thou hast not let me know whom thou wilt send with me. Yet thou hast said, I know thee by name, and thou hast also found grace in my sight.
Exo 33:13 Now therefore, I pray thee, if I have found grace in thy sight, shew me now thy way, that I may know thee, that I may find grace in thy sight: and consider that this nation is thy people.
Exo 33:14 And he said, My presence shall go with thee, and I will give thee rest.
Exo 33:15 And he said unto him, If thy presence go not with me, carry us not up hence.
Exo 33:16 For wherein shall it be known here that I and thy people have found grace in thy sight? is it not in that thou goest with us? so shall we be separated, I and thy people, from all the people that are upon the face of the earth.
Exo 33:17 And the LORD said unto Moses, I will do this thing also that thou hast spoken: for thou hast found grace in my sight, and I know thee by name.
Exo 33:18 And he said, I beseech thee, shew me thy glory.
Exo 33:19 And he said, I will make all my goodness pass before thee, and I will proclaim the name of the LORD before thee; and will be gracious to whom I will be gracious, and will shew mercy on whom I will shew mercy.
Exo 33:20 And he said, Thou canst not see my face: for there shall no man see me, and live.
Exo 33:21 And the LORD said, Behold, there is a place by me, and thou shalt stand upon a rock:
Exo 33:22 And it shall come to pass, while my glory passeth by, that I will put thee in a clift of the rock, and will cover thee with my hand while I pass by:
Exo 33:23 And I will take away mine hand, and thou shalt see my back parts: but my face shall not be seen.
Exo 34:1 And the LORD said unto Moses, Hew thee two tables of stone like unto the first: and I will write upon these tables the words that were in the first tables, which thou brakest.
Exo 34:2 And be ready in the morning, and come up in the morning unto mount Sinai, and present thyself there to me in the top of the mount.
Exo 34:3 And no man shall come up with thee, neither let any man be seen throughout all the mount; neither let the flocks nor herds feed before that mount.
Exo 34:4 And he hewed two tables of stone like unto the first; and Moses rose up early in the morning, and went up unto mount Sinai, as the LORD had commanded him, and took in his hand the two tables of stone.
Exo 34:5 And the LORD descended in the cloud, and stood with him there, and proclaimed the name of the LORD.
Exo 34:6 And the LORD passed by before him, and proclaimed, The LORD, The LORD God, merciful and gracious, longsuffering, and abundant in goodness and truth,
Exo 34:7 Keeping mercy for thousands, forgiving iniquity and transgression and sin, and that will by no means clear the guilty; visiting the iniquity of the fathers upon the children, and upon the children's children, unto the third and to the fourth generation.
Exo 34:8 And Moses made haste, and bowed his head toward the earth, and worshipped.
Exo 34:9 And he said, If now I have found grace in thy sight, O Lord, let my Lord, I pray thee, go among us; for it is a stiffnecked people; and pardon our iniquity and our sin, and take us for thine inheritance.
Notice God is quoting from Exodus 20:5-7:
Exo 20:5 Thou shalt not bow down thyself to them, nor serve them: for I the LORD thy God am a jealous God, visiting the iniquity of the fathers upon the children unto the third and fourth generation of them that hate me;
Exo 20:6 And shewing mercy unto thousands of them that love me, and keep my commandments.
Exo 20:7 Thou shalt not take the name of the LORD thy God in vain; for the LORD will not hold him guiltless that taketh his name in vain.
Love of God, is keeping/glorifying His character alway.
The Ten Commandments reveals God's character, by which we are to be compared:
Jas 1:22 But be ye doers of the word, and not hearers only, deceiving your own selves.
Jas 1:23 For if any be a hearer of the word, and not a doer, he is like unto a man beholding his natural face in a glass:
Jas 1:24 For he beholdeth himself, and goeth his way, and straightway forgetteth what manner of man he was.
Jas 1:25 But whoso looketh into the perfect law of liberty, and continueth therein, he being not a forgetful hearer, but a doer of the work, this man shall be blessed in his deed.
The Law of Liberty that James refers to, is the very Ten Commandments:
Psa 119:44 So shall I keep thy law continually for ever and ever.
Psa_119:45 And I will walk at liberty: for I seek thy precepts.
Love of God?
Jas 2:5 Hearken, my beloved brethren, Hath not God chosen the poor of this world rich in faith, and heirs of the kingdom which he hath promised to them that love him?
Jas 2:6 But ye have despised the poor. Do not rich men oppress you, and draw you before the judgment seats?
Jas 2:7 Do not they blaspheme that worthy name by the which ye are called?
Jas 2:8 If ye fulfil the royal law according to the scripture, Thou shalt love thy neighbour as thyself, ye do well:
Jas 2:9 But if ye have respect to persons, ye commit sin, and are convinced of the law as transgressors.
Jas 2:10 For whosoever shall keep the whole law, and yet offend in one point, he is guilty of all.
Jas 2:11 For he that said, Do not commit adultery, said also, Do not kill. Now if thou commit no adultery, yet if thou kill, thou art become a transgressor of the law.
Jas 2:12 So speak ye, and so do, as they that shall be judged by the law of liberty.
What commandment and Law did James cite from? Remember, they had the OT, for the Jews were the caretakers of the "oracles of God".