Fear God - The antidote to following creature idols, and “vanities,” whether self-righteousness (Ecc 7:16, Ecc 7:18), or wicked oppression and other evils (Ecc 8:12, Ecc 8:13), or mad mirth (Ecc 2:2; Ecc 7:2-5), or self-mortifying avarice (Ecc 8:13, Ecc 8:17), or youth spent without God (Ecc 11:9; Ecc 12:1).
this is the whole duty of man - literally, “this is the whole man,” the full ideal of man, as originally contemplated, realized wholly by Jesus Christ alone; and, through Him, by saints now in part, hereafter perfectly (1Jo 3:22-24; Rev 22:14).