The New Covenant Necessary
"For if that first covenant had been faultless, there should no place have been sought for the second; for finding fault with them He said, Behold the days come, saith the Lord, when I will make a New Covenant" (Heb. viii. 7, 8).
The fault was two-fold: (1) The covenant itself; and (2) "with them," i.e., Israel. The fault of the Old Covenant was that sin could only be passed over. The fault with Israel was that they were unable to fulfil the terms of the covenant.