John Gill's Bible Commentary Ver. 7. Sanctify yourselves therefore , etc.] By abstaining from such impious and idolatrous practices, and separating themselves from all that gave into them, as well as by observing the holy commandments of the Lord; otherwise internal sanctification is not the work of man, but of the Lord himself, as in ( Leviticus 20:8): and be ye holy ; or a separate people from all others in worship and conversation: for I [am] the Lord your God ; who is a holy God, and therefore it became them to be holy, in imitation of him, ( Leviticus 19:2).
Matthew Henry Commentary
Verses 1-9 - Are we shocked at the unnatural cruelty of the ancient idolaters i sacrificing their children? We may justly be so. But are there not very many parents, who, by bad teaching and wicked examples, and by the mysteries of iniquity which they show their children, devote them to the service of Satan, and forward their everlasting ruin, in a manne even more to be lamented? What an account must such parents render to God, and what a meeting will they have with their children at the da of judgment! On the other hand, let children remember that he wh cursed father or mother was surely put to death. This law Chris confirmed. Laws which were made before are repeated, and penaltie annexed to them. If men will not avoid evil practices, because the la has made these practices sin, and it is right that we go on tha principle, surely they should avoid them when the law has made the death, from a principle of self-preservation. In the midst of thes laws comes in a general charge, Sanctify yourselves, and be ye holy. It is the Lord that sanctifies, and his work will be done, though it be difficult. Yet his grace is so far from doing away our endeavours, tha it strongly encourages them. Work out your salvation, for it is God that worketh in you.
Original Hebrew והתקדשׁתם6942 והייתם1961 קדשׁים6918 כי3588 אני589 יהוה3069 אלהיכם׃430