Psalms 141:3,4 - Joseph Benson’s Commentary on the Old and New Testaments

Set a watch before my mouth That I may not, through mine own infirmity, and the great provocation of mine enemies, break forth into any unadvised speeches, or any expressions of impatience, distrust, envy, or malice; keep the door, &c. My lips, which are the door of my mouth, whence words come forth. Incline not my heart Suffer it not to be inclined, either by the temptations of the devil, the world, or the flesh, to any evil thing Whatever inclination there may be in me to sin, let it be not only restrained but mortified by divine grace; and keep me, not only from wicked words and works, but from all evil motions of the heart, which might otherwise draw me to join with wicked men in sinful courses, or to act wickedly as they do. And let me not eat of their dainties Let me not partake of the pleasures or advantages which they gain by their wickedness. My troubles and afflictions are more desirable than such prosperity.