Raven,
Against that is the revelation that God has gifted teachers to the church - and of course that Paul was caught up into the presence of the Glorified Christ and received the Gospel from Him.
Best,
Matthew 24
5 For many shall come in my name, saying, I am Christ; and shall deceive many.
If every religion has a different claim then the only thing I can do is to see for myself what the scripture said.
For instance one religion may say that Jesus actually sweat blood, I went to scripture and found that it does not exactly say that at all.
I see no reason not to get help on understanding scripture but I am not going to put my life in the hands of some one unless what they say is word for word backed by scripture.