Matthew Henry Commentary Ecclesiastes 4:13-16

"Better is a poor and wise youth than an old and foolish king, who knoweth not how to receive admonition any more. For out of prison he came forth to be king; yea, even in his kingdom he was born poor. I saw all the living that walk under the sun, that they were with the youth, the second, that stood up in his stead. There was no end of all the people, even of all them over whom he was: yet they that come after shall not rejoice in him. Surely this also is vanity and a striving after wind." — Ecclesiastes 4:13-16 (ASV)

People are never at ease and satisfied for long; they are fond of change. This is nothing new. Princes see themselves slighted by those they have endeavored to oblige; this is vanity and vexation of spirit. But the willing servants of the Lord Jesus, our King, rejoice in Him alone, and they will love Him more and more for all eternity.