That unity of charity which is the mark of a Christian is a gift of the Holy Spirit. Here are some words of St. Augustine, taken from his commentary of the First Letter of St. John:
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| Descent of the Holy Spirit, Syriac Rabulla Gospel (6th c.) |
Whoever carries out his commandment abides in God and God in him. And we can tell that we are dwelling in him by the Spirit he has given us. If you find charity in yourself, you have the Spirit of God to give you understanding, a thing most necessary.
How can we know whether or not we have received the Holy Spirit? Let each one question his own heart. If he loves his brothers then the Spirit of God dwells in him. Let him examine and test himself in God’s sight, to discover whether he harbors in his heart a love of peace and unity, a love of the Church as it extends throughout the length and breadth of the world. Let him not look for love only of the brother who is present, for we have many whom we do not see, but with whom we are united in the Spirit.
There is nothing strange in that. They are not all here with us, but we all belong to the one Body and have a single Head in heaven. So then, if you would know whether you have received the Spirit, ask your own heart: do you perhaps have the outward sign of the sacrament without the virtue of the sacrament? Ask your heart: if the love of your brothers is there, you can be at peace. There can be no love without the Holy Spirit, for Paul cries out to us: The love of God has been poured into our hearts by the Holy Spirit he has given us.
