St. Symeon Metaphrastis: Let us each realize, then, what we have lost...

Let us each realize, then, what we have lost and repeat the lamentation of the prophet: "Our inheritance is despoiled by strangers and our house by aliens" (Lam. 5:2), because we disobeyed the commandment and surrendered ourselves to our own desires, delighting in sordid and worldly thoughts. Then our soul was far away from God and we were like fatherless orphans. Thus, if we are concerned for our own soul we must make every effort to purge away evil thoughts and "all the self-esteem that exalts itself against the knowledge of God" (2 Cor. 10:5). 

And when we have forcibly applied ourselves to keeping God's temple spotless, then He who promised to make His dwelling in it will come to us. Then the soul recovers its inheritance and is privileged to become a temple of God. For, after thus Himself expelling the devil and his army, from henceforth He reigns within us.

St. Symeon Metaphrastis