Nearly 2,000 years ago, the Apostle Paul gave a young minister named Titus some advice that is good for any Christians who long to minister sound Bible doctrine to others:
βIn all things shewing thyself a pattern of good works:Β in doctrine shewingβ¦ sincerityβ (Titus 2:7).
The dictionary says the wordΒ sincereΒ meansΒ pureΒ andΒ unmixed. Thatβs why Paul wrote,
βLet us keep the feast,Β notΒ withβ¦ the leaven of malice and wickedness;Β butΒ with the unleavened bread ofΒ sincerityβ¦β (1 Cor. 5:8).
God told the Jews under the law to keep the βfeastβ of unleavened bread right after they kept the passoverΒ by not mixing leaven in their breadΒ (Lev. 23:4-8), and Paul says that the way to keep that feast today under grace is to keep the leaven of sin out of our lives to show God how thankful we are that βChrist our passover is sacrificed for usβ (1 Cor. 5:7).
Now you would think that every believer would know that our lives should be pure and unmixed with sins like βmaliceβ and βwickednessβ as we teach the doctrine of grace. But the carnal Corinthians wereΒ teachingΒ grace butΒ livingΒ in malice (1 Cor. 14:20) and wickedness (1 Cor. 5:13), wrongly believing that grace is a license to sin those particular sins and many others. If that describesΒ yourΒ Christian life and ministry of the doctrine of Godβs grace, Iβd invite you to consider showingΒ sincerityΒ in doctrine instead. Ours is a high and holy calling!
And there are other things with which doctrine shouldnβt be mixed. Paul described his ministry to the Corinthians as one that was conducted βin simplicity and godly sincerity,Β not with fleshly wisdomβ (2 Cor. 1:12). Corinth was a city in Greece, and the Greeks were known for the βwisdomβ of their philosophers. So in writing to the Corinthians, Paul decried βthe wisdom of menβ over and over (1 Cor. 1:17-3:19), insisting thatΒ heΒ had not mixed doctrine with worldly wisdom (1 Cor. 2:4) as evidently Corinthβs βten thousandβ false teachers had done among them (1 Cor. 4:15). Perhaps the reason they seem to have bought into this was that they thought such a mixture was the only way to make the doctrine of grace more palatable and popular. That prompted Paul to tell them what he told Titus, that doctrine should be preached inΒ sincerityΒ instead.
Now youβd think that nearly 2,000 years later preachers would know better than to mix Bible doctrine with the wisdom of men. But when the theory of evolution arose, many pastors were intimidated by scienceβscience that was actually nothing more than βscience falsely so calledβ (1 Tim. 6:20). So some of them mixed that example of unbiblical worldly wisdom with the doctrine of creation and came up with something called βtheistic evolution.β Thatβs the theory that claims that evolution is real, but that it was set in motion and superintended by God! And there are many other examples that could be cited of mixing doctrine with the wisdom of men.
But instead of taking your valuable time to cite more examples of the folly of worldly wisdom, Iβd rather point out one more thing with which sound Bible doctrine should not be mixed, something Paul pointed out when he told the Philippians about some who βpreach ChristΒ even of envy and strife; andβ¦ contention, not sincerelyβ (Phil. 1:15,16). There are believers who mix sound doctrine with things like envy and strife and contention. In other words, they preach doctrine just to pick a fight with others! I hear from men like this all the time, and I believe it is just as dishonoring to the Lord as mixing doctrine with carnal wickedness or fleshly wisdom.
Before you set this article aside, why not pray about this important matter? Doctrine that is unmixed with carnality, human wisdom, or contentious envy and strife is sure to give your words the clarity of sincerity that you long for as you share grace truth with others. source