As Your Days, So Shall Your Strength Be

Using the promise "As your days, so shall your strength be," Spurgeon first walks his listeners through the many ways Christians discover their own weakness — in daily duties, in illness and suffering, in trying to grow spiritually, and especially in temptation — arguing that this awareness of weakness is not something to despair over but is actually the very thing that opens the door for God's strength. He then unpacks the promise itself: it is guaranteed by God's omnipotence, limited wisely to what is actually needed each day (not given out in advance to satisfy fears or desires), and perfectly adaptable to every size of trial — whether ordinary days or the darkest storms, God's strength will always match the difficulty. He closes by drawing two contrasting conclusions: for believers, this promise is a reason to stop doubting and step forward boldly into whatever lies ahead, while for those without God, he warns that their strength is only declining with age and they have no such promise to carry them through death and judgment.Sermon delivered by Charles Spurgeon on August 22, 1858.