If only it were that simple. If it were we could easily call you a heretic or as you say someone who's purpose is to undermine the faith. No Satan is far too clever and all he needs to do is to get you to believe something other than the truth and then in turn you'll unconscientiously accept myths. That's exactly what 2 Timothy 4:1 - 4 is referring to:
I charge you in the presence of God and of Christ Jesus, who is to judge the living and the dead, and by his appearing and his kingdom: preach the word; be ready in season and out of season; reprove, rebuke, and exhort, with complete patience and teaching. For the time is coming when people will not endure sound teaching, but having itching ears they will accumulate for themselves teachers to suit their own passions, and will turn away from listening to the truth and wander off into myths.
It's the Word which we're to teach and use as our plumb line, not science or any other man-made standard. Whenever we deviate from it then we open ourselves up to falling into Satan's trap.