Interpreting Non-Biblical Illustrations in Biblical Teaching
Jesus frequently employed earthly images to illuminate spiritual realities—wind and birth in John 3, seeds and soil in the parables, shepherds and sheep throughout the Gospels. The practice of using non-biblical illustrations to teach biblical truth follows this pattern, yet it requires careful handling to avoid distorting the message or elevating the illustration to the level of Scripture itself.
The Nature of Illustration in Biblical Teaching
A parable, as defined in Smith's Bible Dictionary, is "a placing beside, a comparison, a similitude, an illustration of one subject by another" [1]. This definition captures the essential function of any teaching illustration: it stands beside the truth, not as the truth itself. The New Testament applies this term broadly, from short proverbs to extended metaphors [1], indicating that illustration was a flexible pedagogical tool in biblical times.
When Jesus told Nicodemus about being born again, he used "earthly things" as metaphors—the wind's invisible movement, the physical act of birth—to explain spiritual realities [2, 9]. Adam Clarke notes that Christ "illustrated this new birth by a most expressive metaphor taken from earthly things" [2]. John Gill similarly observes that these doctrines "were delivered in a plain and easy style, and illustrated by similes taken from earthly things, as from human birth, from the water, and from the wind" [9]. The earthly image served the heavenly truth; it did not replace it.
Boundaries and Warnings
The use of non-biblical illustrations becomes problematic when the illustration obscures rather than clarifies, or when it introduces foreign concepts into the text. Calvin warned against allegorical excess, noting that Origen and his imitators "corrupted the whole Scripture" by "hunting everywhere for allegories" and extracting "smoke out of light" [6]. While Paul himself used allegory in Galatians 4, Calvin emphasizes that Paul did not wish "all histories, indiscriminately to be tortured to an allegorical sense" [6]. The distinction matters: an illustration should illuminate what the text already says, not impose a meaning the text does not contain.
Calvin's commentary on Isaiah reinforces this caution when discussing representations of God. After demonstrating God's infinite power, the prophet asks, "To whom then will ye liken me? for no image that is formed will have any likeness or resemblance to me" [3]. While this passage addresses physical idolatry, the principle extends to conceptual representations: no earthly analogy fully captures divine reality. Every illustration limps.
The Test of Fidelity
The primary criterion for evaluating non-biblical illustrations is whether they faithfully serve the biblical text. Paul speaks of "comparing spiritual things with spiritual"—expounding Spirit-inspired Old Testament Scripture by comparison with the Gospel, and conversely illustrating Gospel mysteries by comparing them with Old Testament types [7]. This internal cross-referencing within Scripture provides the model: illustrations should clarify what Scripture itself teaches, not introduce novel doctrines.
False teachers in the early church were identified partly by their introduction of "new forms of teaching" [5]. John Gill notes that some taught "another doctrine, from that of the Bible, of Christ and his apostles" [8], using their teaching methods to undermine sound doctrine. The illustration itself can become a vehicle for error if it carries assumptions or implications contrary to biblical teaching.
Practical Application
Effective use of non-biblical illustrations requires several disciplines. First, the teacher must ensure the illustration genuinely parallels the biblical truth, not merely shares a superficial resemblance. Second, the illustration must remain subordinate to the text—hearers should remember the biblical principle, not merely the clever analogy. Third, the teacher should acknowledge the illustration's limits, noting where the comparison breaks down. Fourth, illustrations drawn from contemporary culture require particular care, as cultural assumptions may smuggle unbiblical ideas into the teaching.
The new covenant itself demonstrates God's pedagogical patience. Hebrews 8:9 describes how God "took them by the hand—as a father takes his child by the hand to support and guide his steps" [4]. This image of divine condescension—God stooping to human capacity—justifies the use of earthly illustrations while simultaneously reminding teachers that no human image exhausts divine truth. The illustration serves; it does not define.
Sources
- 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”
- John (Methodist/Wesleyan) “Adam Clarke on John 3:12: If I have told you earthly things - If, after I have illustrated this new birth by a most expressive metaphor taken from earthly things, and after all you believe not; how can you believe, should I tell you of heavenly things, in such language as angels use, where earthly images and illustrations can have no place? Or, if you, a teacher in Israel, do not understand the nature of such an earthly thing, or custom of the kingdom established over the Jewish nation, as being born of baptism, practised every day in the initiation of proselytes, how will you understand such ”
- CCEL (Reformed) “Calvin, Commentary on Isaiah, Vol. 3, section 8.30: in guarding the Jews against distrust, at the same time condemns the superstitions of the Gentiles, and declares that it is inconsistent with the nature of God to be represented by painting or by any kind of likeness. This shews clearly that Paul’s doctrine fully agrees with it; for the Prophet, after having shewn that the power of God is infinite, since he holds all things in his fist, at length concludes, “To whom then will ye liken me? for no image that is formed will have any likeness or resemblance to me.” Or, what resemblance will you a”
- Hebrews (Presbyterian) “Jamieson, Fausset & Brown on Hebrews 8:9: Not according to, &c.--very different from, and far superior to, the old covenant, which only "worked wrath" (Rom 4:15) through man's "not regarding" it. The new covenant enables us to obey by the Spirit's inward impulse producing love because of the forgiveness of our sins. made with--rather as Greek, "made to": the Israelites being only recipients, not coagents [ALFORD] with God. I took them by the hand--as a father takes his child by the hand to support and guide his steps. "There are three periods: (1) that of the promise; (2) that of the pedag”
- CCEL (Reformed) “Calvin, Commentary on 1-2 Timothy, Titus, Philemon, section 4.4: is a compound, and, therefore, may either be translated, “to teach differently,” or after a new method, or, “to teach a different doctrine.” The translation given by Erasmus, ( sectari ,) “ to follow,” does not satisfy me; because it might be understood to apply to the hearers. Now Paul means those who, for the sake of ambition, brought forward a new doctrine. If we read it, “to teach differently,” the meaning will be more extensive; for by this expression he will forbid Timothy to permit any new forms of teaching to be introduce”
- CCEL (Reformed) “Calvin, Commentary on Genesis, Vol. 1 (Gen 1-23), section 25.13: But because I have before declared, that this history is more profoundly considered by Paul, the sum of it is here briefly to be collected. In the first place, he says, that what is here read, was written allegorically: not that he wishes all histories, indiscriminately to be tortured to an allegorical sense, as Origin does; who by hunting everywhere for allegories, corrupts the whole Scripture; and others, too eagerly emulating his example, have extracted smoke out of light. And not only has the simplicity of Scripture been viti”
- 1 Corinthians (Presbyterian) “Jamieson, Fausset & Brown on 1 Corinthians 2:13: also--We not only know by the Holy Ghost, but we also speak the "things freely given to us of God" (Co1 2:12). which the Holy Ghost teacheth--The old manuscripts read "the Spirit" simply, without "Holy." comparing spiritual things with spiritual--expounding the Spirit-inspired Old Testament Scripture, by comparison with the Gospel which Jesus by the same Spirit revealed [GROTIUS]; and conversely illustrating the Gospel mysteries by comparing them with the Old Testament types [CHRYSOSTOM]. So the Greek word is translated, "comparing" (Co2 10:”
- 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 3:11: If I have told you earthly things,.... Not that the doctrines he delivered were earthly ones; for he was not of the earth, but from heaven, and above all, and so spake not of the earth, but of heaven, Joh 3:31; and this doctrine of regeneration was an heavenly doctrine; and the thing itself required supernatural power, and grace from above: but either they were the more easy doctrines of the Gospel; or were delivered in a plain and easy style, and illustrated by similes taken from earthly things, as from human birth, from the water, and from the wind: and ye believe n”