oh we see through a glass darkly now John and that means all of us
however, we are blessed with the infilling of the Holy Spirit and God has also blessed us with teachers, anointed and chosen by Him to teach
no one has 100% truth and that is why we take counsel from others and we do our best to divide the word of truth correctly
we have also the gift of discernment, which is honed through study, practice and comparison and it is also a spiritual gift
deception is rampant in this world and will continue to get worse, so it is best to get behind the leader now, Jesus, as He says His sheep hear His voice and they follow Him!