As Thy Days, So Shall Thy Strength Be: C.H. Spurgeon Sermons (Unabridged‪)‬

Beloved, it seems a sad thing that every day must die and be followed by a night. When we have seen the hills clad with verdure to their summit, and the seas laving their base with a silver glory; when we have stretched our eye faraway, and have seen the widening prospect full of loveliness and beauty we have felt sad that the sunlight should ever set upon such a scene, and that so much beauty should be shrouded in the oblivion of darkness. But how much reason have we to bless God for nights! My dear friends, if you and I had been without trouble, we never could have had such a promise as this given to us: "As thy days, so shall thy strength be." It is our weakness that has made room for God to give us such a promise as this.