St. John Chrysostom
“Let us help and commemorate them. If Job’s sons were purified by their father’s sacrifice (Job 1:5), why would we doubt that our offerings for the dead bring them some consolation? Let us not hesitate to help those who have died and to offer our prayers for them” (Homilies on 1 Corinthians 41:5 [A.D. 392]).
“Weep for those who die in their wealth and who with all their wealth prepared no consolation for there own souls, who had the power to wash away their sins and did not will to do it. Let us weep for them, let us assist them in the extent of our ability, let us think of some assistance for them, small as it may be, yet let us somehow assist them. But how, and in what way? By praying for them and by entreating others to pray for them, by constantly giving alms to the poor on their behalf. Not in vain was it decreed by the apostles that in the awesome mysteries remembrance should be made of the departed. They knew that here there was much gain for them, much benefit, when the entire people stands with hands uplifted, a priestly assembly, and that awesome sacrificial Victim is laid out, how, when we are calling upon God, should we not succeed in their defense? But this is done for those who have departed in the faith, while even the catechumens are not reckoned as worthy of this consolation, but are deprived of every means of assistance except one. And what is that? We may give alms to the poor on their behalf” (Homilies on Philippians 3:9-10 [A.D. 402].
St. John Chrysostom also recommends to every Christian family that they have a box at some convenient place in their home and that they put into it pennies, which will be used to have masses said for the Poor Souls.