When God makes a covenant, He means eternal business. In biblical times, a covenant was sealed between two parties by their cutting an animal in half and walking between the pieces in a figure-eight movement. Israel had entered into that kind of covenant with God, yet failed to keep it. God was forced to respond with these words:
“Because you have refused the terms of our covenant, I will cut you apart just as you cut apart the calf when you walked between its halves to solemnize your vows” (Jeremiah 34:18).
It is human nature to make and then break covenants. God, however, cannot break a covenant. He promised Jeremiah that if he could break God’s “covenant with the day and the night so that they do not come on their usual schedule, only then will my covenant with David, my servant, be broken. Only then will he no longer have a descendant to reign on his throne” (Jeremiah 33:20-21). The chances of David not having an heir as king on Israel’s throne are less than the chances of the sun not shining anymore! That’s how faithful God is!
With a God who is that unchangeable and faithful, we must also be true to Him—the faithful God who keeps His covenant forever.