Charles H. Spurgeon on Psalms 89:36

His seed shall endure for ever. David's line in the person of Jesus is an endless one, and the race of Jesus, as represented in successive generations of believers, shows no sign of failure. No power, human or Satanic, can break the Christian succession; as saints die others shall rise up to fill their places, so that till the last day, the day of doom, Jesus shall have a seed to serve him. And his throne as the sun before me. In our Lord Jesus the dynasty of David remains upon the throne. Jesus has never abdicated, nor gone into banishment. He reigns, and must reign so long as the sun continues to shine upon the earth. A seed and a throne are the two great promises of the covenant, and they are as important to us as to our Lord Jesus himself; for we are the seed who must endure for ever, and we are protected and ennobled by that King whose royalties are to last for ever.