ACC ~ Acts 2 v46

GLADNESS AND SIMPLICITY OF HEART. CHRYSOSTOM: Do you see that the words of Peter contain this also, namely, the regulation of life? [“And singleness of heart.”] For no gladness can exist where there is no simplicity. HOMILIES ON THE ACTS OF THE APOSTLES 7.

REJOICE. AUGUSTINE: One who wishes to make a place for the Lord should rejoice not in private joy but in the joy of all (gaudio communi). EXPLANATIONS OF THE PSALMS 131.5.

UNITY OF THE TRINITY. AUGUSTINE: If, as they drew near to God, those many souls became, in the power of love, but one soul and these many hearts but one heart, what must the very source of love effect between the Father and the Son? Is not the Trinity for even greater reasons, but one God? … If the love of God poured forth in our hearts by the Holy Spirit, who is given to us, is able to make of many souls but one soul and of many hearts but one heart, how much more are the Father and the Son and Holy Spirit but one God, one Light, one Principle? TRACTATES ON THE GOSPEL OF JOHN 39.5.

ALL IN COMMON. AUGUSTINE: First of all, because you are gathered together in one that you might live harmoniously (unanimes) and that there be one soul and one heart toward God. And you should not call anything your own, but let all things be common to you and distributed to each one of you according to need. LETTER 211.5.