I vehemently disagree with the last statement. A gentile is not lawless nor does a gentile need Torah to lead righteous life. The bar for righteousness is not set very high after all. In the Torah and outside of it.I think it is quite clear myself, but others may disagree.
Authority to give law at the mouth rested with the priesthood.
De 17:8 If there arise a matter too hard for thee in judgment, between blood and blood, between plea and plea, and between stroke and stroke, being matters of controversy within thy gates: then shalt thou arise, and get thee up into the place which the LORD thy God shall choose;
9 And thou shalt come unto the priests the Levites, and unto the judge that shall be in those days, and enquire; and they shall shew thee the sentence of judgment:
10 And thou shalt do according to the sentence, which they of that place which the LORD shall choose shall shew thee; and thou shalt observe to do according to all that they inform thee:
11 According to the sentence of the law which they shall teach thee, and according to the judgment which they shall tell thee, thou shalt do: thou shalt not decline from the sentence which they shall shew thee, to the right hand, nor to the left.
12 And the man that will do presumptuously, and will not hearken unto the priest that standeth to minister there before the LORD thy God, or unto the judge, even that man shall die: and thou shalt put away the evil from Israel. {and will : Heb. not to hearken}
De 21:5 And the priests the sons of Levi shall come near; for them the LORD thy God hath chosen to minister unto him, and to bless in the name of the LORD; and by their word shall every controversy and every stroke be tried: {word: Heb. mouth}
Mal 2:7 For the priests lips should keep knowledge, and they should seek the law at his mouth: for he is the messenger of the LORD of hosts.
God fearing Gentiles learned the law too. God fearing Gentiles in Judaism are not lawless.
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