The fear of the LORD is the beginning of wisdom: a good understanding have all they that do his commandments: his praise endureth for ever. The fear of the Lord is the beginning of wisdom - The original stands thus: ראשית חכמה יראת יהוה reshith chokmah, yirath Yehovah, The beginning of wisdom is the fear of Jehovah. Wisdom itself begins with this fear; true wisdom has this for its commencement. It is the first ingredient in it, and is an essential part of it. In vain does any man pretend to be wise who does not fear the Lord; and he who fears the Lord departs from evil: he who lives in sin neither fears God, nor is wise.
A good understanding have all they that do his commandments - These last words we add as necessary to make up the sense; but there is no need of this expedient, as the words of the original literally read thus: "The beginning of wisdom is the fear of Jehovah; good discernment to the doers." That is, They who act according to the dictates of wisdom, the commencement of which is the fear of Jehovah, have a sound understanding, discern their duty and their interest, and live to secure their own peace, their neighbour's good, and God's glory.
Commentary on the Bible, by Adam Clarke [1831].