For this. That is, the commandments that Paul now cites. He who loves his neighbor will not steal from him or take his life or covet his goods or bear false witness concerning him or commit adultery with his wife.
Bear false witness. Textual evidence favors (cf. p. 10) the omission here of this command. It may have been added by a copyist in order to make the familiar list of the second table of the commandments more complete. However, that Paul was evidently making no attempt at completeness is indicated by his words, “and if there be any other commandment.” The order of the commandments differs from that of Ex. 20:13-15, the seventh being placed before the sixth. The same arrangement appears in Mark 10:19; Luke 18:20; James 2:11. The regular order is found in Matt. 19:18. Paul was probably following the order in a manuscript of the LXX. The order he follows is that of the Codex Vaticanus in Deut. 5:17. In Ex. 20:13-15 the same manuscript places the seventh commandment first in the series of the last five, then the eighth, then the sixth.
Briefly comprehended. Gr. anakephalaiod, “to sum up.”
Thou shalt love. The quotation is from Lev. 19:18 (see comment there).