Examples of Non-Scriptural Analogies in Christian Teaching
Christian teachers have long employed non-scriptural analogies to illuminate theological truths, recognizing that the finite human mind often grasps abstract doctrine more readily through concrete comparison. The practice finds biblical warrant in Christ's own teaching method: parables themselves are "a placing beside, a comparison, a similitude, an illustration of one subject by another" [2], drawing from everyday experience to convey spiritual realities. Yet Scripture itself acknowledges its own selectivity—John notes that "many other signs" Jesus performed were "not written in this book" [1], and the evangelist observes that "the world itself could not contain the books that should be written" about all Christ did [6]. This incompleteness invites supplementary explanation.
The Shield and the Shamrock
Perhaps the most famous extra-biblical analogy is Patrick's purported use of the shamrock to explain the Trinity. Though no contemporary source documents this, the image persists because it attempts what Scripture does not: a visual, tangible representation of three-in-one. Similarly, medieval theologians employed the shield diagram (the Scutum Fidei) to map Trinitarian relations—"The Father is God, the Son is God, the Spirit is God, yet the Father is not the Son," and so forth. These devices risk modalism or tritheism if pressed too far, yet they serve catechetical purposes where abstract formulation alone might fail.
Martial and Domestic Metaphors
Paul's athletic imagery—the race, the boxing match, the crown—extends beyond direct scriptural command into the realm of analogy. When later teachers compare the Christian life to a soldier's discipline or a farmer's patience, they follow this pattern. John Chrysostom, for instance, drew on contemporary civic life, noting that "Nineveh, its repentance an example to us" [7], and using "Babel, an example of mischievous agreement" [4] to warn against unity in error. These are not scriptural proof-texts but historical illustrations pressed into theological service.
The domestic sphere yields similar analogies. Marriage as a picture of Christ and the Church appears in Ephesians, but teachers have elaborated this into detailed comparisons of courtship, covenant, and consummation that go well beyond Paul's text. Chrysostom refers to "the union of Christ and the Church" as a mystery [7], and subsequent tradition has spun out analogies of betrothal, dowry, and household management that owe more to cultural practice than to explicit biblical instruction.
Analogies of Light and Water
The physical properties of light—its speed, its ability to illuminate without being diminished, its spectrum—have furnished countless sermon illustrations. Augustine's analogy of the sun (one source producing light and heat) for the Trinity, or Jonathan Edwards's reflections on light as a type of divine glory, extend scriptural imagery (God is light, Christ is the light of the world) into scientific and philosophical territory. Similarly, water's three states (ice, liquid, vapor) became a popular, if imperfect, Trinitarian analogy in modern catechesis, despite its modalist implications.
Pedagogical Necessity and Doctrinal Risk
The use of such analogies reflects a pastoral judgment: abstract propositions alone rarely move the heart or lodge in memory. Paul himself insisted on "wholesome words of our Lord Jesus Christ" [8] and warned against those who "teach otherwise" [5, 8], yet his own letters employ metaphors drawn from law courts, slave markets, and athletic games—none of them direct divine revelation, all of them culturally embedded illustrations.
The danger lies in mistaking the analogy for the reality. When Hebrews warns against being "carried aside" by "divers and strange doctrines" [3], it cautions against elevating human tradition to the level of apostolic teaching. An analogy that clarifies the Trinity in one cultural moment may obscure it in another; the shamrock's three leaves suggest three parts rather than three persons, and the water analogy collapses into modalism under scrutiny. Chrysostom's reference to "unwritten sayings" of Christ [9] reminds us that oral tradition and illustrative teaching have always supplemented the written text, yet must never contradict it. The test remains whether the analogy serves the scriptural truth or subtly distorts it.
Sources
- John “Therefore Jesus did many other signs in the presence of his disciples, which are not written in this book; -- John 20:30”
- Smith's Bible Dictionary “Smith's Bible Dictionary: Parable — (The word parable is in Greek parable (parabole) which signifies placing beside or together, a comparison, a parable is therefore literally a placing beside, a comparison, a similitude, an illustration of one subject by another.--McClintock and Strong. As used in the New Testament it had a very wide application, being applied sometimes to the shortest proverbs, (1 Samuel 10:12; 24:13; 2 Chronicles 7:20) sometimes to dark prophetic utterances, (Numbers 23:7,18; 24:3; Ezekiel 20:49) sometimes to enigmatic maxims, (Psalms 78:2; Proverbs 1:6) or metaphors expand”
- Hebrews (Presbyterian) “Jamieson, Fausset & Brown on Hebrews 13:9: about--rather, as oldest manuscripts read, "carried aside"; namely, compare Eph 4:14. divers--differing from the one faith in the one and the same Jesus Christ, as taught by them who had the rule over you (Heb 13:7). strange--foreign to the truth. doctrines--"teachings." established with grace; not with meats--not with observances of Jewish distinctions between clean and unclean meats, to which ascetic Judaizers added in Christian times the rejection of some meats, and the use of others: noticed also by Paul in Co1 8:8, Co1 8:13; Co1 6:13; Rom”
- CCEL/NPNF (Eastern Orthodox) “John Chrysostom, Homilies on John & Hebrews: [see Disciples ]. Applause, in Church, 10 . Arius, heresy of, refuted by Christ's indwelling in His disciples, 304 . Article, the, why added in the phrase, "The Word," 7 , 8 ; omission of, sometimes unimportant, 17 , 18 ; distinguishes Christ from all, 64 . "As," expressing agreement not comparison, 41 ; said of the Father and the Son implies their equality, of men not so, 303 , 304 . Asa, his gout a punishment for sin, 132 . Babel, an example of mischievous agreement, 206 . Baptism, promise at, 4 ; gift of the Spirit in, 36 ; regeneration in, 37 ; ”
- 1 Timothy (Baptist/Reformed) “John Gill on 1 Timothy 6:3: If any man teach otherwise,.... Or another doctrine, as the Syriac version renders it; a doctrine different from what the apostle had now taught, concerning the duty of servants to their masters; as did the false teachers, who despised dominion or government; not only civil government, and so spoke evil of rulers and magistrates; and church government, and therefore reviled the apostles, elders, and pastors of churches; but family government, and encouraged disobedience to parents and masters; see Pe2 2:10 or teach another doctrine, from that of the Bible, of Chris”
- John (Baptist/Reformed) “John Gill on John 21:25: And there are also many other things which Jesus did,.... Which refer not to his doctrines and discourses, his sermons and prayers, and the conversation he had with his disciples, and others, on different accounts; but to the signs, and wonders, and miraculous operations, which were done by him, that are neither recorded in this, nor in any of the evangelists: the which, if they should be written everyone; with all the particular circumstances relating to them: I suppose that even the world itself could not contain the books that should be written. The Arabic versi”
- CCEL/NPNF (Eastern Orthodox) “John Chrysostom, Homilies on Galatians–Colossians–Thessalonians: angels by the Church, 80 ; the union of Christ and the Church so called, 146 . Natural, what acts are so called, 73 . Nature, does not force man to sin, 57 . Necessity, not to be pleaded in excuse for sin, 57 . Nineveh, its repentance an example to us, 101-2 . Novatians, denied repentance to the lapsed, 25 (note) . Oaths, not necessary to beget confidence, 62 . Obedience, slight breach of, punishable, 7 . Passover, its historical and mystical meaning, 165 ; how kept by Israelites, how to be kept by Christians, 165 . Paul, St., fo”
- 1 Timothy (Presbyterian) “Jamieson, Fausset & Brown on 1 Timothy 6:3: teach otherwise--than I desire thee to "teach" (Ti1 6:2). The Greek indicative implies, he puts not a merely supposed case, but one actually existing, Ti1 1:3, "Every one who teaches otherwise," that is, who teaches heterodoxy. consent not--Greek, "accede not to." wholesome--"sound" (Ti1 1:10): opposed to the false teachers' words, unsound through profitless science and immorality. words of our Lord Jesus Christ--Paul's inspired words are not merely his own, but are also Christ's words.”
- CCEL/NPNF (Eastern Orthodox) “John Chrysostom, Homilies on Acts & Romans: 538 ; values men's souls as His purchase, 524 ; makes God's wisdom apparent, 535 ; His example of patient endurance, 536 ; He executes punishment, 34 ; His passion foretold, 55 ; and the punishment denounced, 58 ; "the Prophet like unto Moses," 55 ; and more than Moses, 59 ; "The Prince of Life," 57 ; works "by the Spirit of God," 72 ; "sent from God," 37 sq. ; in what sense He "knew not that day and hour," 12 ; the Angel in the burning bush, 103 ; Giver of the Law, 107 ; unwritten sayings of, 214 . Christians, to fight the good fight, 154 ; and so w”