Musar do Hioba 17:9

All that we have recounted here regarding the evil desire is but a drop in the ocean in view of how greatly we must be warned against him, for in everything, in every deed and in every good quality the evil desire comes to destroy and to spoil. We have simply opened the door slightly to inform those who do not know the beginning of their ways, concerning the evil desire. And the wise will understand and hasten to thrust him from within himself as it is written : "And he that has clean hands increases strength" (Job 17:9).

And because this desire to triumph over an enemy is very common in the hearts of people and one may not sense it within himself, therefore, we write to warn those who revere the Lord to direct their hearts to God with true and complete devotion — to pour out their souls towards the presence of the Lord in prayer for all Jews — those who love him and those who hate him, and thus fulfill the commandment : "And you shall love your neighbor as yourself" (Lev. 19:18). "And he that has clean hands becomes stronger" (Job 17:9).