182. For He intimates that the thief is the unclean spirit, who cannot find entrance into those who walk in the light of good works, but if he has caught any one in the darkness of earthly desires, and in the midst of the enjoyment of earthly pleasures, he spoils them of all the flower of eternal virtue. And therefore the Lord says: “Lay up for yourselves treasures in heaven, where neither rust nor moth destroy, and where thieves do not break through and steal. For where thy treasure is, there will thy heart be also.”