Catena Fidei

1 Thessalonians 5:21 (WEB)
Test all things, and hold firmly that which is good.

Catechism · 1

§801Paragraph 2 · The Church - People of God, Body of Christ, Temple of the Holy SpiritRead at vatican.va
“"Their office (is) not indeed to extinguish the Spirit, but to test all things and hold fast to what is good,"” — Catechism footnote: LG 12; cf. 30; 1 Thess 5:12, 19-21; John Paul II, Christifideles Laici, 24.

Cyril of Jerusalem, Catechetical Lectures Lecture 7
“Be an approved banker, holding fast that which is good, abstaining from every form of evil.” — editor's note: This saying is quoted three times in the Clementine Homilies as spoken by our Lord. See Hom. II. § 51; III. § 50; XVIII. § 20: “Every man who wishes to be…
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Eusebius of Caesarea, Church History VII.7Book VII
“I received the vision as agreeing with the apostolic word, which says to them that are stronger, ‘Be skillful money-changers.’”” — editor's note: ὡς ἀποστολικῇ φωνῇ συντρέχον…γίνεσθε δόκιμοι τραπεζιται. This saying, sometimes in the brief form given here, sometimes as part of a longer sentence (e.g. in…
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Basil the Great, Letters Letter 42
““Prove all things; hold fast that which is good; abstain from every form of evil.”” — editor's note: 1 Thess. v. 21, R.V.
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Jerome, Letters Letter 61
“I take up many writers that from the many I may learn many things; according to that which is written “reading all things, holding fast those that are good.”” — editor's note: 1 Th. v. 21. “Prove all things,” Vulg. and A.V.
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Jerome, Letters Letter 62
“…we should select what is good and avoid what is bad in their writings according to the words of the Apostle, “Prove all things: hold fast that which is good.”” — editor's note: 1 Th. v. 21.
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Jerome, Letters Letter 84
““Read all things,” says the apostle, “hold fast that which is good.”” — editor's note: 1 Thess. v. 21.
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Gregory of Nyssa, On the Making of Man On the.21On the Making of Man
“…the good from the evil, the Apostle says is a mark of a more perfect condition and of “exercised senses,” for which reason also he bids us “prove all things,” and says that “discernment” belongs to the spiritual man: but “knowledge” is not always to be understood of skill and acquaintance with anything, but of the…” — editor's note: 1 Thess v. 21.
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Tertullian, On the Veiling of Virgins Chapter 16
“Let that, accordingly, be to you Scripture, and Nature, and Discipline, which you shall find to have been sanctioned by God; just as you are bidden to “examine all things, and diligently follow whatever is better.”” — editor's note: See 1 Thess. v. 21.
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Tertullian, The Prescription Against Heretics Chapter 3
“…heresy; although they contrariously interpret his words to their own side, when he says in another passage, “Prove all things; hold fast that which is good;” as if, after proving all things amiss, one might not through error make a determined choice of some evil thing.” — editor's note: 1 Thess. v. 21. [But Truth is to be demonstrated as a theorem, not treated as a problem of which we must seek the solution.]
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Aphrahat, Select Demonstrations Demonstration 22
“And prove everything; hold fast that which is good; and flee from every evil thing.” — editor's note: 1 Thess. v. 21, 22; 2 Tim. iii. 16.
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Clement of Alexandria, The Stromata, or Miscellanies I.11Book I
““Prove all things,” the apostle says, “and hold fast that which is good,” speaking to spiritual men, who judge what is said according to truth, whether it seems or truly holds by the truth.” — editor's note: 1 Thess. v. 21.
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