A wise man's heart is at his right hand His understanding or wisdom is always present with him, and ready to direct him in all his actions. He manages all his affairs prudently and piously. He mentions the right hand because that is the common instrument of action. But a fool's heart is at his left His understanding and knowledge serve him only for idle speculation and vain ostentation, but is not useful or effectual to govern his affections and actions. Yea also, when he walketh by the way Not only in great undertakings, but in his daily conversation; his wisdom faileth him Hebrew, לבו חסר, his heart is wanting; he acts preposterously and foolishly, as if he were without a heart. He saith, &c. He discovers his folly to all that meet him or converse with him.
Related Commentaries of Ecclesiastes 10:2
Ecclesiastes 10:2-3
2 A wise man's heart is at his right hand; but a fool's heart at his left.
3 Yea also, when he that is a fool walketh by the way, his wisdom faileth him, and he saith to every one that he is a fool.