"Therefore, since we are receiving a kingdom that cannot be shaken, let us be thankful, and so worship God acceptably with reverence and awe." Hebrews 12:18

Grace is the very foundation of the kingdom which cannot be moved. It is all of grace, from first to last. By grace we are saved; by grace we are called; by grace we are what we are. In order, therefore, to maintain our interest clear in the kingdom which cannot be shaken, we must hold grace fast; for as soon we cease to do this, we lose our comfortable prospects of this kingdom, and of our own participation in it and its heavenly blessings. It is a kingdom of present grace and of future glory, therefore built wholly upon grace and not upon merit; wholly upon the favor of God and not upon the works of the creature. As long, then, as we hold fast grace, we hold the kingdom; for the kingdom stands in grace.

But why should this exhortation be needed? Is it not very easy to hold fast grace? Yes, very, when there is nothing to test it; and that is the way that most hold it--in the head, not in the heart. But the real partakers of the life of God are tempted on every hand to renounce their hold of grace, through the power of the world, the strength of sin, the subtlety of their unwearied adversary, the unbelief, infidelity, and despondency of their wretched heart. Thus sometimes we are tempted to look away from the kingdom which cannot be shaken, and descend to lower things; to stand either upon that earth which has been shaken under our feet, or that heaven, that Pharisee's heaven which has been shaken over our heads, and thus get lost and bewildered among the wreck and ruin of those things which have been shaken and are removed.