Charles Ellicott Commentary Hebrews 7:12

"For the priesthood being changed, there is made of necessity a change also of the law." — Hebrews 7:12 (ASV)

This verse connects itself with the parenthesis in Hebrews 7:11. For if the priesthood is changed there takes place also of necessity a change of law. It is no light matter to speak of the order of Aaron as set aside: this carries with it a change of law.