>>17797220
>say which one is the right christian denomination?
He did
>how can someone know they are not following best practices if every authority figure in their life says so?
You can follow the method Jesus gave us for this problem: testing the traditions of men by the word of God (Mark 7)

The solution is God's word. The religions of man are self-serving, worldly, and indefensible. The bible alone gives you a worldview which allows rationality, and which is God-focused, humble and transcendent, because in Jesus Christ all things hold together and there is no other name by which we may be saved.