Bonaventure — on 2Tim 3:5 (Collationes de Septem Donis, Collation 3)

“Some are content to have exterior holiness, namely in word and gesture and outward conduct; but this is to adorn holiness outwardly, like a man who whitewashes himself outwardly and makes a sepulcher of the dead, which outwardly is whitewashed. But just as "feigned righteousness is not righteousness, but double iniquity," so feigned holiness is not holiness, but rather iniquity. Against such the Apostle says: "In the last times there will be men who are lovers of pleasures, having the appearance of piety, but denying its power." "Having the appearance of piety," "that is, of religion," says the Gloss. Those having the appearance of piety are hypocrites. For such a one is a son of perdition. Of such a one it is said: "With the breath of his lips he shall strike the impious one," namely him who will have the greatest appearance of piety. Therefore the second exercise of the gift of piety is through the custody of interior holiness. But some have no mercy on their soul; indeed, they do the worst they can to their soul. They supremely hate their soul; they could not do worse to it than they do, because they do everything the devil suggests to them. "Have pity on your soul!" And some under the appearance of piety take up things that are against their soul. They say: I will go to baseness under the appearance of piety. What piety is this? Certainly none.”