I'd just like to mention to tings about this post.
First the earliest Gospel recorded was Matthew, it was written around 60 AD in Hebrew. Jesus dies around 35 AD which means the first Gospel recorded was recorded 25 years after Christs death not 60 or 90.
Which most biblical scholars will agree was first written in Greek by a non eyewitness. Not exactly a compelling case.
secondly pauls letters were regarded as scripure even before the canization of the NT whic is evident based on peter's remark in 2 Peter 3:14-16
Are you seriously arguing that a book that most biblical scholars regard as psuedonymous is the proof that Paul's letters were "scripture" before the "holy" scripture even existed? Nobody knows who authored the book, and the fact that Peter, who was allegedly Paul's greatest rival at the time they were alive, is supposedly endorsing him, makes the likelihood that it isn't Peter. If anything, this comment shines an even brighter light on how little time you have taken to investigate your beliefs.
As for the authority, He had apostlicauthority, meaning that he had he had vision and preformed miracles just like the rest of the apostles under the authority of Christ.
Miracles? Could you be specific about what miracles he performed? I know a magician who can perform signs, wonders, and miracles which fool even the most educated people. I've gone to a church where the pastor prayed for someone to get better, they did, and everyone cheered it as a miracle. It couldn't have been the surgery or medications, it was the work of God! How do I know that Paul's miracles are not the same kind of miracles that pastor performed?
Not only are you quick to assume that a book with a nameless author is proof of Paul's credibility, but you have no skepticism at all of the ancient accounts of his "miracles" when magicians and pastors living today can perform "miracles" which enforce the beliefs of entire crowds of modern people.
Let me say something in this regard. There are two types of people in this world. Those who live to prove their own beliefs and those who live to disprove their own beliefs. You are the former and I am the latter. I believe what I believe because there is not sufficient evidence to disprove it. But I try everyday to do so. You believe what you believe because you specifically seek out information to support your beliefs and ignore evidence which casts a doubt on it. Tell me, am I wrong? Is that not really the reason you hate to debate? Because it makes you realize how much you must ignore or how you must selectively seek out evidence to support what you believe to continue to believe what you believe? As a Christian, have you ever seriously tried to disprove Christianity? If you really believed in it, then what would be the harm in trying?