This excerpt is from the original PyroManiac blog back in September 2005. Phil discusses the dilemma of when to engage in doctrinal debate, and when to set it aside.
One thing you'll quickly notice if you make even a casual study of historical theology is this: the history of the church is a long chronicle of doctrinal development that runs from one profound controversy to the next.
In one sense it is sad that the history of the church is so marred by doctrinal conflicts, but in another sense that is precisely what the apostles anticipated. Even while the New Testament was still being written, the church was contending with serious heresies and dangerous false teachers who seemed to spring up everywhere. This was so much a universal problem that Paul made it one of the qualifications of every elder that he be strong in doctrine and able to refute those who contradict (Titus 1:9). So the church has always been beset by heretics and false teachings, and church history is full of the evidence of this.
Obviously, then, we who love the truth cannot automatically shy away from every fight over doctrine. Especially in an era like ours when virtually every doctrine is deemed up for grabs, Christians need to be willing and prepared to contend earnestly for the faith.
On the other hand, even in an obsessively "tolerant" age such as ours, the opposite danger looms large as well. There are some people who are always spoiling for a fight over little matters, and no issue is too trivial for them to overlook. It seems they are looking for reasons to take offense, and if you're not careful what you say or how you say it, they'll throw a major hissy. More often than not, it's an insignificant issue, an unintentional slight, or an inadvertently indelicate "tone" that provokes the tantrum. (Ironically, these same folks are sometimes more than willing to tolerate major doctrinal errors in the name of "charity.")
Scripture includes all the following commands: "If it be possible, as much as lieth in you, live peaceably with all men" (Romans 12:18). "It was needful for me to write unto you, and exhort you that ye should earnestly contend for the faith which was once delivered unto the saints" (Jude 3). "If there come any unto you, and bring not this doctrine, receive him not into your house, neither bid him God speed: For he that biddeth him God speed is partaker of his evil deeds" (2 John 10-11). "I beseech you, brethren, mark them which cause divisions and offences contrary to the doctrine which ye have learned; and avoid them" (Romans 16:17). "Him that is weak in the faith receive ye, but not to doubtful disputations" (Romans 14:1). "Follow peace with all men, and holiness" (Hebrews 12:14).
Clearly, there are two extremes to be avoided. One is the danger of being so narrow and intolerant that you create unnecessary divisions in the body of Christ. The other is the problem of being too broad-minded and sinfully tolerant—so ecumenically minded that you settle for a shallow, false unity with people whom we are commanded to avoid or whose errors we are morally obligated to refute.
It would seem that the only way to be faithful to all the above commands is to have a sound and biblical understanding of how to distinguish between core doctrines and peripheral ones.
But search for serious material that carefully discusses biblical guidelines for making such distinctions wisely, and you'll come up mostly dry. This is an issue I fear most Christians have not considered as soberly and carefully as we should, and it would be my assessment that one of the crying needs of the church in this age of mindless postmodern subjectivity is a clear, careful, and thorough biblical understanding of when it's time to fight and when it's time to fellowship.