“By so much was Jesus made a surety of a better testament.”
King James Version (KJV)
7:22 Of so much better a covenant - Unchangeable, eternal. Was Jesus made a surety - Or mediator. The word covenant frequently occurs in the remaining part of this epistle. The original word means either a covenant or a last will and testament. St. Paul takes it sometimes in the former, sometimes in the latter, sense; sometimes he includes both.
Heb 7:22 By so much. By such solemn means was Jesus made a surety, the pledge and firm assurance. A surety is intended to secure absolute certainty. Of a better testament. Rather, covenant. Jesus became the pledge of the new covenant, the Gospel. God has established him as its high priest forever, by the sanctity of an oath. This is the line of argument.