Adam Clarke on Ecclesiastes 4:16

There is no end of all the people - This is supposed to refer to the multitudes of people who hail the advent and accession of a new sovereign; for, as Suetonius remarks, A plerisque adorari solem orientem, "Most people adore the rising sun." But when the new king becomes old, very few regard him; and perhaps he lives long enough to be as much despised by the very persons who before were ready to worship him. This is also a miserable vanity. Thus the blooming heir: - "Shall feel the sad reverse: honored awhile;

Then, like his sire, contemn'd, abhorr'd, forgot."

C.