Vanity - This word הבל hebel, or, when used as a proper name, in Genesis 4:2, “Abel”, occurs no less than 37 times in Ecclesiastes, and has been called the key of the book. Primarily it means “breath,” “light wind;” and denotes what:
(1) passes away more or less quickly and completely;
(2) leaves either no result or no adequate result behind, and therefore
(3) fails to satisfy the mind of man, which naturally craves for something permanent and progressive: it is also applied to:
(4) idols, as contrasted with the Living, Eternal, and Almighty God, and, thus, in the Hebrew mind, it is connected with sin.
In this book it is applied to all works on earth, to pleasure, grandeur, wisdom, the life of man, childhood, youth, and length of days, the oblivion of the grave, wandering and unsatisfied desires, unenjoyed possessions, and anomalies in the moral government of the world.
Solomon speaks of the world-wide existence of “vanity,” not with bitterness or scorn, but as a fact, which forced itself on him as he advanced in knowledge of men and things, and which he regards with sorrow and perplexity. From such feelings he finds refuge by contrasting this with another fact, which he holds with equal firmness, namely, that the whole universe is made and is governed by a God of justice, goodness, and power. The place of vanity in the order of Divine Providence - unknown to Solomon, unless the answer be indicated in Ecclesiastes 7:29 - is explained to us by Paul, Romans 8, where its origin is traced to the subjugation and corruption of creation by sin as a consequence of the fall of man; and its extinction is declared to be reserved until after the Resurrection in the glory and liberty of the children of God.
Vanity of vanities - A well-known Hebrew idiom signifying vanity in the highest degree. Compare the phrase, “holy of holies.”
All - Solomon includes both the courses of nature and the works of man Ecclesiastes 1:4-11. Compare Romans 8:22.