John 2:23Now while he was in Jerusalem at the Passover Feast, many people saw the miraculous signs he was doing and believed in his name.[c] 24But Jesus would not entrust himself to them, for he knew all men. 25He did not need man's testimony about man, for he knew what was in a man.
I read this and was surprised at what Jesus did in verse 24. Jesus could not trust some people with his identity because he knew what kind of person they were on the inside. Even if those people saw him produce miracles they would probably just turn him over to the authorities out of fear of being arrested or whatever they were threatened with.
There will be a day when you will not be able to trust your identity with certain people, and it's vital that you learn now who you are in Christ Jesus, and how to discern right from wrong.
People who do not learn this gift of discernment, will end up in a bunch of trouble they could have saved themselves from.