And I will make an everlasting covenant with them… – Jeremiah 32:40

In the order of God’s working He always advances from the good to the better. The old law was put away because He found fault with it, and therefore the new covenant must last till a fault can be found with it, which will never be. This is the glory which excelleth: no brightness can exceed the glory of God in the face of Jesus Christ. There can be nothing more gracious, nothing more righteous, nothing more just to God or more safe to man, than the plan of salvation set forth in the covenant of grace. The moon gives way to the sun, and the sun gives way to a lustre which shall exceed the light of seven days; but what is to supersede the light of free grace and dying love, the glory of the love which gave the Only-begotten that we might live through Him? The covenant of grace made with us in Christ Jesus is the masterpiece of divine wisdom and love, and it is established on such sure principles that it must last for ever.

Who else could have thought of a covenant, “ordered in all things and sure,” to be made with guilty man? It was also divine in its carrying out, and therefore it shall endure. Who could have provided a Saviour like the Only-begotten of the Father? Who could have given Him for a covenant but the Father? The covenant is divine in its maintenance. Note well the word of the Lord: “I will make an everlasting covenant with them.” He does not say, “They shall make a covenant with Me”; but “I will make a covenant with them.” That God is the maker of the covenant is a reason for its certainty and everlastingness. The faithful God has given guarantees which fix it fast, even His promise and His oath; those two immutable things, in which it is impossible for God to lie. Through these we have strong consolation, who have fled for refuge to Christ Jesus. ~ C.H. Spurgeon

https://www.blueletterbible.org/Comm/spurgeon_charles/sermons/2108.cfm