1 John 3:1

• §1692Part Three · Life in ChristRead at vatican.va

  “What faith confesses, the sacraments communicate: by the sacraments of rebirth, Christians have become "children of God,"” — Catechism footnote: Jn 1:12; 1 Jn 3:1[ETML:C/].

Augustine of Hippo

• Augustine of Hippo, A Treatise on Faith and the Creed Chapter 9

  “For we are not reconciled unto Him except through that love in virtue of which we are also called sons: as we are no more “under fear, like servants,” because “love, when it is made perfect, casteth out fear;” and [as] “we have received the spirit of liberty, wherein we cry, Abba, Father.”” — editor's note: 1 John iii. 1. The word Dei = of God, is sometimes added here.

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• Augustine of Hippo, Expositions on the Psalms Psalm 50

  ““See,” saith the Apostle, “what love God hath bestowed upon us, that we should be called, and be, the sons of God.”” — editor's note: 1 John iii. 1.

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• Augustine of Hippo, Homilies on the First Epistle of John Homily 4

  ““Behold what manner of love the Father hath given us, that we should be called sons of God, and be (such).”” — editor's note: 1 John iii. 1.

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• Augustine of Hippo, On the Holy Trinity IV.3Book IV

  “For then we shall be like Him, for we shall see Him as He is.” — editor's note: 1 John iii. 1

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Tertullian

• Tertullian, On Modesty Chapter 2

  “And so it will be becoming for ‘the sons of God’ too to be ‘pitiful-hearted’ and ‘peacemakers;’ ‘giving in their turn just as Christ withal hath given to us;’ ‘not judging, that we be not judged.’” — editor's note: 1 John iii. 1, 2.

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Clement of Alexandria

• Clement of Alexandria, The Stromata, or Miscellanies Chapter 2

  “Chap. iii. 1.” — the author cites it

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• John 1:12

  Cited together in Catechism §1692.

• Philippians 1:27

  Cited together in Catechism §1692.

• 2 Peter 1:4

  Cited together in Catechism §1692.