they: i.e. instruction and law.
ornament. garland.
neck. Showing cheerful and willing obedience, in contrast with stiffneckedness (Exodus 32:9) and pride (Isaiah 3:16). See also Genesis 41:42.
Related Commentaries of Proverbs 1:9
Proverbs 1:9
9 For they shall be an ornament of grace unto thy head, and chainse about thy neck.