“May no one, dearly beloved, make themselves strangers to good works. Let no one claim that his poverty scarcely sufficed for himself and could not help another. What is offered from little is great, and in the scale of divine justice, the quantity of gifts is not measured but the steadfastness of souls.
The “widow” in the Gospel [Luke 21:1-4] put two coins into the “treasury,” and this surpassed the gifts of all the rich. No mercy is worthless before God. No compassion is fruitless. He has given different resources to human beings, but he does not ask different affections.”
Leo the Great (c. 400-461) in Sermon 20.3.1 (FC 93.74 in ACCSL 317).