What actually reaches the dead, and why we bury at martyrs' memorials
Augustine is concluding his answer to Paulinus about burial and the dead, stating what benefits the dead and what burial itself does.
Since this is so, we should not think that anything reaches the dead for whom we are caring except what we solemnly pray for them through the sacrifices of the altar, of prayers, and of alms. Yet these do not benefit all for whom they are offered, but only those for whom, while they lived, provision was made that they might benefit. But because we cannot discern who these are, we ought to offer them for all the baptized, so that none of those to whom these benefits can and should reach may be passed over. For it is better that these things be in excess for those whom they neither harm nor help than that they be lacking for those whom they help. Still, each person does these things more diligently for his own dear ones, so that the same may be done for him by his own. Whatever is spent on burying a body, however, is not a safeguard of salvation but a service of human kindness, according to the affection by which no one ever hates his own flesh. So a person ought to care as much as he can for the flesh of his neighbor when the one who bore it has departed from it. And if those who do not believe in the resurrection of the flesh do these things, how much more ought those who do believe to do them, so that this kind of service paid to a body that is dead but will rise again and remain for eternity is also in some way a testimony of that same faith! But as for being buried near the memorial shrines of martyrs, this seems to me to benefit the deceased only in this way: that by commending him also to the intercession of the martyrs, the affection of prayer for him may be increased.
Latin
Quae cum ita sint, non existimemus ad mortuos, pro quibus curam gerimus, peruenire, nisi quod pro eis siue altaris siue orationum siue elemosynarum sacrificiis sollemniter supplicamus, quamuis non pro quibus fiunt omnibus prosint, sed eis tantum quibus dum uiuunt conparatur, ut prosint. sed quia non discernimus, qui sint, oportet ea pro regeneratis omnibus facere, ut nullus eorum praetermittatur, ad quos haec beneficia possint et debeant peruenire. melius enim supererunt ista eis, quibus nec obsunt nec prosunt, quam eis deerunt, quibus prosunt. diligentius tamen facit haec quisque pro necessariis suis, quo pro illo fiat similiter a suis. corpori autem humando quidquid inpenditur, non est praesidium salutis, sed humanitatis officium secundum affectum, quo nemo umquam carnem suam odio habet unde oportet ut quam potest pro carne proximi curam gerat. cum ille inde recesserit qui gerebat. et si haec faciunt, qui carnis resurrectionem non credunt, quanto magis debent facere qui credunt, ut corpori mortuo, sed tamen resurrecturo et in aeternitate mansuro inpensum eius modi officium sit etiam quodam modo eiusdem fidei testimonium! quod uero quisque apud memorias martyrum sepelitur, hoc tantum mihi uidetur prodesse defuncto, ut commendans eum etiam martyrum patrocinio affectus pro illo supplicationis augeatur.