Not much deeper one can go than looking and reading scripture, questioning it only leads to either believing it happened, or not.
That is all there is, faith, which pleases God. To seek out what is truth, do you believe that Peter was an apostle of the Lord Jesus Christ, having seen him raised from the dead, and go off in the clouds of heaven? Does one even believe that in the beginning God?
the Bible is there, but faith is where the connection comes in between access with God by the Spirit, through the Lord Jesus Christ, who came, died, was buried, and raised again. Everything starts at the Cross, so it's good to read the Gospels, and learn who Jesus Christ was and what are the things he stated, and what were the encounters that he had, and what was it like during the book of Acts, and what was it like around the Apostle Pauls life, and what did he write? Did he ever meet Peter? Did anyone?
Faith is where it is at, and the Bible is fascinating because it co-relates to geographic attributes. Very interesting, a book about God, and his dealings with Mankind, all to have them saved in the end, because of reconciling the world unto himself in Christ, and all people who pass from this life will be resurrected again; unless a person doesn't believe I do not think can even stop God having faith that all will be resurrected again.
So the only deep we can go is simply reading the Bible, and talking things out with God.
Friend, may God bless you.