John Trapp on Psalms 62:9

Verſ. 9. Surely men of low degree are vanity] Man is a depending Creature, and like the Vine muſt have ſomewhat to lean upon; apt he is to leave God, and cleave to the Creature, to make either Men, or Means his refuge: David therefore dehorteth from both, in this and the next verſe; ſhewing, that men of what degree ſoever are in no wiſe to be confided in. The word rendred Vanity denoteth a vain light thing, ſuch as is the breath of ones mouth, or a bubble on the water.

Men of high degree are a lye] There is no more truth, nor aſſurance in them, than in a falſe tale; alſo they fruſtrate mens hopes, as a barren Fruit-tree, Habbak. 3.17.

They are altogether lighter, &c.] Put all Mankind into one bundle, into one balance and vanity into the other, and it will weigh them down, Vt aſcendant ipſi pra vanitate ſimul.