The Blessing of the New Covenant: Knowing God – Hebrews 8:10-11

That grace which was to be the spring of all the blessings of this covenant, unto the glory of God and salvation of the church, was to be deposited in some safe hand, for the accomplishment of these ends. In the first covenant, God at once committed unto man that whole stock of grace which was necessary to enable him unto the obedience of it. And the grace of reward which he was to receive upon the performance of it, God reserved absolutely in his own hand; yea, so as that perhaps man did not fully understand what it was. But all was lost at once that was committed unto our keeping, so as that nothing at all was left to give us the least relief as unto any new endeavors. Wherefore God will now secure all the good things of this covenant, both as to grace and glory, in a third hand, in the hand of a mediator. Hereon the promises are made unto him, and the fulness of grace is laid up in him. As he was the mediator of this covenant, God became his God, and he became the servant of God in a peculiar manner. For he stood before God in this covenant as a public representative of all the elect. God is a God unto him in all the promises he received on the behalf of his mystical body; and he was his servant in the accomplishment of them, as the pleasure of the Lord was to prosper in his hand. – John Owen