Out of voice recognition, a sheep will not follow a stranger. Sheep depend on the shepherd to lead them to safety, feeding grounds, water and away from danger.
There are deceivers who want to take advantage of your sheep-like nature. Jesus said that wolves might disguise themselves as sheep to creep in and get what they want.
If you ever followed a wolf’s voice or were led astray by a corrupted leader it happened because you thought they were close to God and spoke truthfully. Instead of trusting in your own capacity to hear God, you let their voice be your exclusive source.
Sometimes the ‘sheep disguise’ takes the form of persuasive teaching or exceptional personality. The false leader may in fact provide a proxy relationship for God. The leader gives you all the direction, so why do you need God’s voice? ‘They hear from God so you do not need to.’