From Charles Spurgeon’s sermon The Blood of the Everlasting Covenant, preached October 2nd, 1859.
Nothing which man has made is everlasting, because he cannot ensure it against decay. But as for the covenant of grace, well did David say of it, ‘It is ordered in all things and sure.’
…There is not an ‘if’ or a ‘but’ in the whole of it from beginning to end. Freewill hates God’s ‘shalls’ and ‘wills,’ and like man’s ‘ifs’ and ‘buts,’ but there are no ‘ifs’ and ‘buts’ in the covenant of grace.
…Almighty grace rides victoriously over the neck of freewill, and leads it captive in glorious captivity to the all-conquering power of irresistible grace and love. It is a sure covenant, and therefore deserves the title of everlasting.
Furthermore, it is not only sure, but it is immutable. If it were not immutable it could not be everlasting. That which changes passes away. We may be quite sure that anything that has the word ‘change’ on it, will sooner or later die, and be put away as a thing of nought. But in the covenant (of grace) everything is immutable. Whatever God has established must come to pass, and not word, or line, or letter can be altered.