Truth Never Changes, Heresy Does

Truth never changes with the times, but heresy always does. In fact, heresy’s sublety is seen most clearly in the ever-shifting tides of change. The church is threatened by some grave error until a defense is finally mounted, and the threat is defeated. But then the polar opposite of that error springs up somewhere with a totally different, but equally grave, threat. Then the trend shifts back to a variation of the first error. And thus it has been throughout the history of the church. No error can ever comfortably be counted as dead and gone, because the same old errors keep springing up in new dress.

Adapted from The Truth War by John MacArthur