False teachers has been a source of contention since the time Jesus walked the earth and probably beyond and it remains till this very day. The Bible tells us to be on guard (2 Peter 2:1-22). I make it a point to research what I hear so that I will not apply the wrong things to my life. It is our responsibility to search for truth and hold fast to it. With all the technology we have at this day and time we can find an assortment of books, quotes, and videos we can use to learn from. But we must choose the one who speaks the truth.
If what we see and hear is based solely on the Bible we are home free. BUT, if it is based on man's own interpretation this, is where we run into problems. In 2 Peter 2:1-22, Peter has made it incredibly easy for us by giving us characteristics and actions of the false teacher. The false teachers of Peter's day can still be found in the modern world. Nothing has really changed except for the fact that their games have gotten bigger and their ways even more conniving.
Go to God in prayer and let the Holy Spirit be your guide against the things you are unsure of. Let God, the Holy Spirit and God's word lead you because in this sinful world we need to lean on God's understanding not our own.
