(for the law made nothing perfect), and a bringing in thereupon of a better hope, through which we draw nigh unto God.
For the law made nothing perfect, but the bringing in of a better hope did; by the which we draw nigh unto God.
For the Law never made anything perfect–but instead a better hope is introduced through which we [now] come close to God.
(because the Law made nothing perfect). On the other hand, a better hope is introduced, through which we draw near to God.
For the law led no one to perfection, yet truly it introduced a better hope, through which we draw near to God.