What a foe to one's peace is one's own spirit! And what shall I call it? It is often an infernal spirit. Why? Because it bears the mark of Satan upon it. The pride of our spirit, the presumption of our spirit, the hypocrisy of our spirit, the intense selfishness of our spirit are often hidden from us. This wily devil, self, can wear such masks and assume such forms; this serpent, self, can so creep and crawl, can so twist and turn, and can disguise itself under such false appearances, that it is hidden often from ourselves. Who is the greatest enemy we have to fear? We all have our enemies. But who is our greatest enemy? He that you carry in your own bosom; your daily, hourly, and momently companion, that entwines himself in nearly every thought of your heart; that suggests well-nigh every motive; that sometimes puffs up with pride, sometimes inflames with lust, sometimes inflates with presumption, and sometimes works under feigned humility and fleshly holiness.
Now this self must be overcome; for if self overcome us eventually, we shall perish in the condemnation of self. God is determined to stain the pride of human glory. He will never let self, (which is but another word for the creature,) wear the crown of victory. It must be crucified, denied, and mortified; it must be put off, so that Jesus may be put on; that in the denying of self, Jesus may be believed in; and that in the crucifixion of self, there may be a solemn spiritual union with Him who was crucified on Calvary. Now, are we overcoming self? Are we buffeted? What says self? "Buffet again." Are we despised? What says self? "Despise again; retort angry look for angry look, and hasty word, for hasty word; 'an eye for an eye, and a tooth for a tooth.'" But what says the Spirit of God in a tender conscience? "Be not overcome of evil, but overcome evil with good."
The way to overcome self is by looking out of self to Him who was crucified upon Calvary's tree; to receive his image into our heart; to be clothed with his likeness; to drink into his spirit; and "receive out of his fulness grace for grace."