New Defender's Study Bible Notes
4:14 vapour. Even Job, who lived perhaps two hundred years, said: “My life is wind” (Job 42:16; 7:7), and Moses, who lived 120 years, said that “we spend our years as a tale that is told” (or, perhaps, “as a sigh of mourning”) (Deuteronomy 34:7; Psalm 90:9).
4:15 If the Lord will. Thus, the Lord indicates that He does have a will as to whether we “do this or that.” We act presumptuously—and possibly calamitously—when we leave God and His will out of our plans.