IV. Community of goods and of actions is most precious in God's sight
It is a great and very precious thing, beloved, in the Lord's sight, when Christ's whole people engage together in the same duties, and all ranks and degrees of either sex co-operate with the same intent: when one purpose animates all alike of declining from evil and doing good; when God is glorified in the works of His slaves, and the Author of all godliness is blessed in unstinted giving of thanks. The hungry are nourished, the naked are clothed, the sick are visited, and men seek not their own but “that which is another's,” so long as in relieving the misery of others each one makes the most of his own means; and it is easy to find “a cheerful giver,” where a man's performances are only limited by the extent of his power.
By this grace of God, “which works all in all,” the benefit and the deserts of the faithful are both enjoyed in common. For they, whose income is not like, can yet think alike, and when one rejoices over another's bounty his feelings put him on the same level with him whose powers of spending are on a different level. In such a community there is no disorder nor diversity, for all the members of the whole body agree in one strong purpose of godliness, and he who glories in the wealth of others is not put to shame at his own poverty. For the excellence of each portion is the glory of the whole body, and when we are all led by God's Spirit, not only are the things we do ourselves our own but those of others also over the doing of which we rejoice.
Source: Sermons (New Advent)