Ecclesiastes 12:11-13

Amplified Bible, Classic Edition

¹¹ The words of the wise are like prodding goads, and firmly fixed [in the mind] like nails are the collected sayings which are given [as proceeding] from one Shepherd.^(A)

¹² But about going further [than the words given by one Shepherd], my son, be warned. Of making many books there is no end [so do not believe everything you read], and much study is a weariness of the flesh.

¹³ All has been heard; the end of the matter is: Fear God [revere and worship Him, knowing that He is] and keep His commandments, for this is the whole of man [the full, original purpose of his creation, the object of God’s providence, the root of character, the foundation of all happiness, the adjustment to all inharmonious circumstances and conditions under the sun] and the whole [duty] for every man.