TAKE HEED TO YOURSELVES AND THE FLOCK
Objection is often raised even by some sound in the faith - regarding the exposure of error as being entirely negative and of no real edification. Of late, the hue and cry has been against any and all negative teaching. But the brethren who assume this attitude forget that a large part of the New Testament, both of the teaching of our blessed Lord Himself and the writings of the apostles, is made up of this very character of ministry-namely, showing the Satanic origin and, therefore, the unsettling results of the propagation of erroneous systems which Peter, in his second epistle, so definitely refers to as "damnable heresies."
Our Lord prophesied, "Many false prophets shall rise, and shall deceive many." Within our own day, how many false prophets have risen; and oh, how many are the deceived! Paul predicted, "I know this, that after my departing shall grievous wolves enter in among you, not sparing the flock. Also of your own selves shall men arise, speaking perverse things, to draw away disciples after them. Therefore watch." My own observation is that these "grievous wolves," alone and in packs, are not sparing even the most favored flocks. Undershepherds in these "perilous times" will do well to note the apostle's warning: "Take heed therefore unto yourselves, and to all the flock, over the which the Holy Ghost hath made you overseers." It is as important in these days as in Paul's - in fact, it is increasingly important - to expose the many types of false teaching that, on every hand, abound more and more.
--Dr. Harry Ironside (1876-1951)