Let us hear the conclusion of the whole matter: Fear God, and keep his commandments: for this is the whole duty of man.
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Ecclesiastes 12:11-14
Tyndale Open Study Notes (CC BY-SA 4.0).
12:13-14 The editor’s conclusion from studying the Teacher’s work is to fear God (see 3:14; 5:7; 7:18; 8:12-13), which includes the need to obey his commands, because everything we do will be judged (see 11:9; 2 Cor 5:10; Heb 9:27).
Other Bible passages linked to this one, most cited first.
And now, Israel, what doth the LORD thy God require of thee, but to fear the LORD thy God, to walk in all his ways, and to love him, and to serve the LORD thy God with all thy heart and with all thy soul,
He hath shewed thee, O man, what is good; and what doth the LORD require of thee, but to do justly, and to love mercy, and to walk humbly with thy God?
That thou mightest fear the LORD thy God, to keep all his statutes and his commandments, which I command thee, thou, and thy son, and thy son’s son, all the days of thy life; and that thy days may be prolonged.
And unto man he said, Behold, the fear of the Lord, that is wisdom; and to depart from evil is understanding.
He will fulfil the desire of them that fear him: he also will hear their cry, and will save them.
And his mercy is on them that fear him from generation to generation.
Authorship: the book itself or Christian tradition. Approximate dates, as in Carson and Moo, An Introduction to the New Testament, and Longman and Dillard, An Introduction to the Old Testament.