Job 17:9 - Matthew Poole's English Annotations on the Holy Bible

Shall hold on his way, i.e. shall persist in that good way into which he hath entered, and not be turned from it by any afflictions which may befall himself or any other good men, nor by any contempt or reproach cast upon them by the ungodly by reason thereof. He that hath clean hands, i.e. whose life and the course of his actions is holy and righteous; which is a sign that his heart also is pure and perfect. Shall be stronger and stronger; shall not be shaken and discouraged by the grievous afflictions of the godly, nor by the bitter censures and reproaches of hypocrites or wicked men, cast upon them for that cause; but will be continued thereby, and made more constant and resolute in cleaving to God, and his ways and people, in spite of all difficulties and miseries.