I 'got' all of that from the Holy Bible. A translation, not perfect or infallible, but the Word nonetheless. Having cut my teeth on the KJV for most of my life, I began reading other English translations and through comparison satisfied myself that they are by and large trustworthy.
Your church says the Bible teaches more than this, and does so on the supposition that it has properly interpreted the Scriptures. The fact is, a Bible reader takes a whole lot for granted that he does not stop to consider when entering into this type of discussion.