There shall be heresies, and have given us, in anticipation, warnings to avoid them and inasmuch as we are not alarmed because they exist, so we ought not to wonder that they are capable of doing that, on account of which they must be shunned. The LORD teaches us that many "ravening wolves shall come in sheeps clothing." Now, what are these sheep's clothings's, but the external surface of the Christian profession? Who are the ravening wolves but those deceitful senses and spirits which are lurking within to waste the people of Christ? Who are the false prophets but deceptive predictors of the future? Who are the false apostles but the preachers of a false gospel? Who also are the Antichrists, both now and evermore, but the men who rebel against CHRIST? Heresies at the present time, will no less rend the church by their perversion of doctrine, than will Antichrist persecute her at that day by the cruelty of his attacks, except that persecution make seven martyrs, but heresy only apostates. Therefore "heresies myst needs be in order that they which are approved might be made manifest, both those who remained steadfast under persecution, and those who did not wander out of their way into heresy.