In Psalms, chapter eighty-nine, verse four, God’s covenant promise to David was that his “seed,” his line, would rule on the throne forever, as in verses twenty-nine, thirty-six through thirty-seven of this chapter. God’s promise did not involve all of David’s descendants. When the Davidic kings disobeyed God, He removed them just as He delivered the northern kingdom over to its enemies and to captivity when the people persisted in apostasy, as in verses thirty-eight through fifty-one.
The New Testament sees the fulfillment of this verse in the Lord Jesus. The apostle Peter states: “Of this man’s (David’s) seed hath God according to his promise raised unto Israel a Saviour, Jesus, as in Acts twenty-three, verse thirteen. And the angel Gabrel revealed to Mary, “He shall be great, and shall be called the Son of the Highest: and the Lord God shall give unto him the throne of his father David.”
And he shall reign over the house of Jacob forever, and of his kingdom, there shall be no end,” as in Luke one, verses thirty-two to thirty-three. The other verse is Luke one, verse sixty-nine, “And hath raised up an horn of salvation for us in the house of his servant David.”
The theme verse is a foundation built by God through David because He found a heart that was after His own. David’s obedience to God’s will was the difference and set him apart from the rest of the kings from the Davidic line. An example is in First Samuel seventeen, verse thirty-seven, “David said moreover, The LORD that delivered me out of the paw of the lion, and out of the paw of the bear, he will deliver me out of the hand of this Philistine. And Saul said unto David, Go, and the LORD be with thee. The former king, Saul, questions him, “And Saul said to David, Thou art not able to go against this Philistine to fight with him: for thou art but a youth, and he a man of war from his youth,” from verse thirty-three. The difference between David and the rest is he acknowledges God before what He did in the past and believes in what He will do right now against Goliath.
God expects believers to be faithful and courageously use His Word firmly against those who oppose them. In Mark nine, verse twenty-three, “Jesus said unto him, If thou canst believe, all things are possible to him that believeth.”