St. John Chrysostom
Charity is indeed, a great thing, and a gift of God, and when it is rightly ordered likens us unto God himself, as far as that is possible; for it is charity which makes the man.
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But this I say: He who sows sparingly will also reap sparingly, and he who sows bountifully will also reap bountifully. So let each one give as he purposes in his heart, not grudgingly or of necessity; for God loves a cheerful giver. And God is able to make all grace abound toward you, that you, always having all sufficiency in all things, may have an abundance for every good work.
2nd Corinthians 9:6-8