Non-Biblical Examples for Supplementing Biblical Teaching

The New Testament itself records only a fraction of what Jesus said and did. John's Gospel concludes with the observation that "there are also many other things which Jesus did" beyond what the evangelists recorded, so many that "even the world itself could not contain the books that should be written" ^[1]. This acknowledgment of selectivity in the biblical record raises a practical question: may Christian teachers supplement biblical teaching with non-biblical examples, illustrations, or wisdom?

The Sufficiency of Scripture

The apostolic writings establish a boundary around doctrinal content. Paul warns the Corinthians against receiving "another Jesus" or "another gospel" beyond what the apostles preached ^[5]. When writing to Timothy, he identifies heterodoxy as teaching "otherwise" than the "wholesome words of our Lord Jesus Christ" ^[6], making clear that Paul's own inspired instruction carries Christ's authority ^[6]. The author of Hebrews similarly cautions against being "carried aside" by "divers and strange doctrines" that differ from the apostolic faith ^[4]. These passages establish that the substance of Christian doctrine—what must be believed and taught as gospel truth—cannot be augmented or altered by external sources.

This principle of doctrinal sufficiency does not, however, prohibit the use of non-biblical material for illustrative or pedagogical purposes. The distinction lies between the content of revelation and the means of communicating it.

Apostolic Precedent for External Reference

Paul himself demonstrates selective use of non-biblical material. When preaching at Athens, he quoted pagan poets to establish common ground with his audience, though he did so to point toward biblical truth rather than to supplement it. His letters occasionally reference contemporary practices, philosophical categories, or cultural conventions to clarify gospel teaching. The key is that these references serve the exposition of revealed truth rather than standing as independent sources of doctrine.

The apostle's missionary strategy further illustrates this principle. He made it his aim to preach "not where Christ was already named, that I might not build upon another man's foundation" ^[2]. This concern was not about avoiding all reference to existing knowledge, but about establishing churches on apostolic teaching rather than on human tradition or speculation.

The Boundary Between Illustration and Innovation

The line between legitimate illustration and doctrinal innovation turns on whether the non-biblical material is presented as authoritative for faith. A preacher may reference historical events, scientific observations, literary works, or philosophical arguments to clarify, apply, or illustrate biblical teaching. What he may not do is treat these sources as possessing the same authority as Scripture or as filling gaps in biblical revelation.

Solomon's accumulation of "peculiar treasure of kings and provinces" and his employment of "singers" and "musical instruments of all sorts" ^[3] demonstrates that even divinely appointed leaders engaged with the cultural productions of their time. The question is not whether Christians may interact with non-biblical knowledge, but whether such knowledge is subordinated to revealed truth or elevated alongside it.

Practical Application

When Paul preached in Corinth, he deliberately avoided relying on "worldly wisdom" or an "ornate style" despite his education in Tarsus, a city renowned for its schools of learning ^[7]. His restraint was not a rejection of all learning, but a refusal to let human eloquence obscure the gospel's power. The same principle applies to contemporary teaching: non-biblical examples may clarify but must never compete with the biblical text for authority. The preacher's task is to expound what Scripture says, not to construct a synthesis of biblical and extra-biblical wisdom as though both carried equal weight.

Sources

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”
Romans (Presbyterian) “Jamieson, Fausset & Brown on Romans 15:20: Yea, &c.--rather, "Yet making it my study (compare Co2 5:9; Th1 4:11, Greek) so to preach the Gospel, not where Christ was [already] named, that I might not build upon another man's foundation: but (might act) as it is written, To whom no tidings of Him came, they shall see," &c.”
Ecclesiastes (Presbyterian) “Jamieson, Fausset & Brown on Ecclesiastes 2:8: (Kg1 10:27; Ch2 1:15; Ch2 9:20). peculiar treasure of kings and . . . provinces--contributed by them, as tributary to him (Kg1 4:21, Kg1 4:24); a poor substitute for the wisdom whose "gain is better than fine gold" (Pro 3:14-15). singers--so David (Sa2 19:35). musical instruments . . . of all sorts--introduced at banquets (Isa 5:12; Amo 6:5-6); rather, "a princess and princesses," from an Arabic root. One regular wife, or queen (Est 1:9); Pharaoh's daughter (Kg1 3:1); other secondary wives, "princesses," distinct from the "concubines" (Kg1 1”
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”
2 Corinthians (Presbyterian) “Jamieson, Fausset & Brown on 2 Corinthians 11:4: if, &c.--which in fact is impossible. However, if it were possible, ye might then bear with them (see on Co2 11:1). But there can be no new Gospel; there is but the one which I first preached; therefore it ought not to be "borne" by you, that the false teachers should attempt to supersede me. he that cometh--the high-sounding title assumed by the false teachers, who arrogated Christ's own peculiar title (Greek, Mat 11:3, and Heb 10:37), "He that is coming." Perhaps he was leader of the party which assumed peculiarly to be "Christ's" (Co2 10:7;”
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.”
1 Corinthians (Presbyterian) “Jamieson, Fausset & Brown on 1 Corinthians 2 (introduction): PAUL'S SUBJECT OF PREACHING, CHRIST CRUCIFIED, NOT IN WORLDLY, BUT IN HEAVENLY, WISDOM AMONG THE PERFECT. (1Co. 2:1-16) And I--"So I" [CONYBEARE] as one of the "foolish, weak, and despised" instruments employed by God (Co1 1:27-28); "glorying in the Lord," not in man's wisdom (Co1 1:31). Compare Co1 1:23, "We." when I came-- (Act 18:1, &c.). Paul might, had he pleased, have used an ornate style, having studied secular learning at Tarsus of Cilicia, which STRABO preferred as a school of learning to Athens or Alexandria; here, doubt”

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