Papal infallibility and the development of doctrine

This is primarily for Non Catholics to learn about Catholicism, if you're Catholic, I'm glad you're here, and I hope it helps you as well.
Contrary to what you may have heard, Catholics love the Bible and believe it is the word of God. I actually hold to the view, that everything needed for salvation is in the Bible, but not explicitly developed. So I am part of the material sufficiency gang, As we've jokingly been called