If ye fulfil the royal law according to the scripture, Thou shalt love thy neighbour as thyself, ye do well:
х Ei (G1487) mentoi (G3305)] 'If, however (in the honour, you pay the rich), ye are fulfilling the royal law,' etc., not depreciating the poor, but only honouring each according to his due, my censure does not apply; but respect of persons is a breach of it' (Alford after Eatius). I prefer, 'If in very deed, on the one hand, ye fulfill the royal law, etc., ye do well; but if, on the other, ye respect persons, ye practice sin.' The Jewish Christians boasted of the "law" (Acts 15:1; Acts 21:18-24; Romans 2:17; Galatians 2:12). To this the 'indeed' alludes. '(Ye rest in the law): If indeed (then) ye fulfill it, ye do well; but if,' etc.
Royal - the law that is king of all laws, as He is King of kings: the sum of the Ten Commandments. The great King is love: His law is the royal law of love. He 'is no respecter of persons;' to respect persons is at variance with Him and His law. The law is the "whole;" the particular "scripture" (Leviticus 19:18) quoted is a part. To break a part is to break the whole (James 2:10).
Ye do well - being 'blessed in your deed,' as doers, not forgetful hearers (James 1:25).