St.
Augustine on the Preferential Option for the Poor

God does not demand much of you. He asks back what he gave you, and
from him you take what is enough for you. The superfluities of the rich
are the necessities of the poor. When you possess superfluities, you
possess what belongs to others. (Exposition on Psalm 147, 12).
Christ who is rich in heaven chose to be hungry in the poor. Yet in
your humanity you hesitate to give to your fellow human being. Don't
you realize that what you give, you give to Christ, from whom you
received whatever you have to give in the first place. (Commentary on
Psalm 75,9)
Whenever you did it for one of the least of mine, you did it for me.
Christ has received what you have given; it has been received by the
one who gave you the means to give it; it has been received by the one
who at the end will give you himself. (Sermon 389,4)
Go on making use of your special, expensive foods, because you have got
into the bait of them, because if you change your habits you get sick.
Go on making use of your superfluities, but give the poor their
necessities. He looks to you, you look to God. He looks to a hand that
was made as he was, you look to a hand that made you. But it didn't
only make you, it also made the poor man with you. He gave you both
this life as a single road to travel along. You have found yourselves
companions, walking along the same road; he's carrying nothing, you
have an excessive load. He’s carrying nothing with him, you are
carrying more than you need. You are overloaded; give him some of what
you’ve got. At a stroke, you feed him and lessen your load. So give to
the poor; I’m begging you, I’m warning you, I’m commanding you, I’m
ordering you. Give to the poor whatever you like. (Sermon 389,5-6)
You give bread to a hungry person; but it would be better were no one
hungry, and you could give it to no one. You clothe the naked person.
Would that all were clothed and this necessity did not exist. (Tractate
1 John 8,8)
Do you think it’s a small matter that you are eating someone else’s
food? Listen to the apostle: We brought nothing into this world. You
have come into the world, you have found a full table spread for you.
But the Lord’s is the earth and its fullness. God bestows the world on
the poor, he bestows it on the rich. (Sermon 29, 2)
Christ is at once rich and poor: as God, rich; as a human person, poor.
Truly, that Man rose to heaven already rich, and now sits at the right
hand of the Father, but here, among us, he still suffers hunger, thirst
and nakedness: here he is poor and is in the poor. (Serm. 123,4).