If you want to read some of the earliest post-biblical documents written by the early church leaders you can do so by clicking here. Last summer I did an independent study where I translated through several of the writings of the early church fathers and it was extremely rewarding. I walked away from the study thinking that many Christians would benefit a lot more from reading these documents than the latest Christian author. In other words, these documents should not just be viewed as the scholar's treasure chest that cannot be unlocked and explored with profitability by normal believers. Below are a couple of quotes from The Martyrdom of Polycarp (a document from the second century) to give you a bit of a flavor for some of the things you will find:
"Eighty and six yeas have I served him, and he has done me no wrong; how then can I blaspheme my king who saved me?"
"Let me be as I am. He that granted me to endure the fire will grant me also to remain at the fire unmoved, without beings secured with nails."