The more you walk with Him the more aware you are of sin in world & yourself through sanctification. Truthfully I believe there are more wolves in sheep's clothing than soldiers of God in most churches.
Not that it should deter us; but to your point our only remedy is to get into His Word, be vigilant and recognize evil for what it is by their fruit.
I pray for all our brothers and sisters of Christ that we can continue to fight the good fight for His glory