2 Corinthians 7:1
“Having therefore these promises, beloved.”
What promises? That we should be temples of God, sons and daughters, have Him indwelling, and walking in us, be His people, have Him for our God and Father.
“Let us cleanse ourselves from all defilement of flesh and spirit.”
Let us neither touch unclean things, for this is cleansing of the flesh; nor things which defile the soul, for this is cleansing of the spirit. Yet he is not content with this only, but adds also,
“Perfecting holiness in the fear of God.” For not to touch the unclean thing does not make clean, but there needs something else besides to our becoming holy; earnestness, heedfulness, piety. And he well said, “In the fear of God.” For it is possible to perfect chasteness, not in the fear of God but for vainglory. And along with this he implies yet another thing, by saying, “In the fear of God;” the manner, namely, whereafter holiness may be perfected. For if lust be even an imperious thing, still if you occupy its territory with the fear of God, you have stayed its frenzy.
4. Now by holiness here he means not chastity alone, but the freedom from every kind of sin, for he is holy that is pure. Now one will become pure, not if he be free from fornication only, but if from covetousness also, and envy, and pride, and vainglory, yea especially from vainglory which in every thing indeed it behooves to avoid, but much more in almsgiving; since neither will it be almsgiving, if it have this distemper, but display and cruelty. For when thou dost it not out of mercy, but from parade, such deed is not only no alms but even an insult; for you have put your brother to open shame. Not then the giving money, but the giving it out of mercy, is almsgiving. For people too at the theatres give, both to prostitute boys and to others who are on the stage; but such a deed is not almsgiving. And they too give that abuse the persons of prostitute women; but this is not lovingkindness, but insolent treatment. Like this is the vainglorious also. For just as he that abuses the person of the harlot, pays her a price for that abuse; so too do you demand a price of him that receives of you, your insult of him and your investing him as well as yourself with an evil notoriety. And besides this, the loss is unspeakable. For just as a wild beast and a mad dog springing upon us might, so does this ill disease and this inhumanity make prey of our good things. For inhumanity and cruelty such a course is; yea, rather more grievous even than this. For the cruel indeed would not give to him that asked; but thou dost more than this; you hinder those that wish to give. For when you parade your giving, you have both lowered the reputation of the receiver, and hast pulled back him that was about to give, if he be of a careless mind. For he will not give to him thenceforth, on the ground of his having already received, and so not being in want; yea he will often accuse him even, if after having received he should draw near to beg, and will think him impudent. What sort of almsgiving then is this when thou both shamest yourself and him that receives; and also in two ways Him that enjoined it: both because while having Him for a spectator of your alms, you seek the eyes of your fellow-servants besides Him, and because you transgress the law laid down by Him forbidding these things.
Source: Homilies on Second Corinthians (New Advent)