Job 11:16 - Joseph Benson’s Commentary on the Old and New Testaments

Because thou shalt forget thy misery Thy happiness shall be so great that it shall blot out the remembrance of thy past miseries; and remember it as waters that pass away Thou shalt remember it no more than men remember either a land-flood, which, as it comes, so it goes away suddenly, and leaves few or no marks or memorials behind it; or the waters of a river, which pass by in constant succession.