I believe that one of the greatest needs in the church today for us as believers is discernment. There are so many ideas floating around out there and people (even evangelicals) are flocking to them as though they were some new great thing that God is supposably doing. Discernment is the ability to sift out the truth from the error and with some of these these teachings nowdays, some things can be totally Biblical while other things can in error. It isn't anything new.
We need believers these days that aren't afraid of what people are going to think. We need people that are wiling to point out error in love so that others are not falling into things which might lead them astray. We need believers that are bold and willing to stand for the truth. Scripture says that in the last days that many will be deceived and led astray. Although we don't know the day or time of His coming, we certainly do not want to fall into Satan's snare of falsehood. In Mathew 24 Jesus was talking to His disciples, but the warnings of not being deceived certainly apply to us today. Deception in the church is a big deal.
Mathew 24:4-13 "Jesus answered: “Watch out that no one deceives you. For many will come in my name, claiming, ‘I am the Messiah,’ and will deceive many. You
will hear of wars and rumors of wars, but see to it that you are not
alarmed. Such things must happen, but the end is still to come. Nation will rise against nation, and kingdom against kingdom. There will be famines and earthquakes in various places. All these are the beginning of birth pains. “Then you will be handed over to be persecuted and put to death, and you will be hated by all nations because of me. At that time many will turn away from the faith and will betray and hate each other, and many false prophets will appear and deceive many people. Because of the increase of wickedness, the love of most will grow cold, but the one who stands firm to the end will be saved. And this gospel of the kingdom will be preached in the whole world as a testimony to all nations, and then the end will come."
The truth is that there is no greater joy when people are walking in the truth. John said it this way 3 John 1:4 "I have no greater joy than to hear that my children are walking in the truth." There really is a joy to know that those we love are walking in the truth and when someone you love gets deceived by something that has serious error in it, the impact is sad and very real. But God is at work and He is faithful.