powerful, and glorious; but this will be owing, not to themselves, but to the unchangeable grace and power of God: God only is in and of himself immutable; and he is unchangeable in his nature, perfections, and purposes, and in his love and affections to his people, and in his covenant, and the blessings and promises of it; and even in his threatenings. I. In his nature and essence, being simple, and devoid of all composition, as has been proved: the more simple and free from mixture and composition