Charles H. Spurgeon on Psalms 77:8

Doth his promise fail for evermore? Let no appearing impossibilities make you question God's accomplishment of any of his gracious words. Though you cannot see how the thing can be done, it is enough, if God has said that he will do it. There can be no obstructions to promised salvation, which we need to fear. He who is the God of this salvation, and the Author of the promise, will prepare his own way for the doing of his own work, so that "every valley shall be filled, and every mountain and hill brought low." Lu 3:5. Though the valleys be so deep that we cannot see the bottom, and the mountains so high that we cannot see the tops of them, yet God knows how to raise the one and level the other; Isa 53:1: "I that speak in righteousness (or faithfulness) am mighty to save." If anything would keep back the kingdom of Christ, it would be our infidelity; but he will come, though he should find no faith on the earth. See Ro 3:3. Cast not away your confidence because God defers his performances. Though providence run cross, though they move backwards and forwards, you have a sure and faithful word to rely upon. Promises, though they be for a time seemingly delayed, cannot be finally frustrated. Dare not to harbour such a thought within yourselves. The being of God may as well fail as the promise of God. That which does not come in your time, will be hastened in his time, which is always the more convenient season. Timothy Cruso.