True Christianity has fundamental beliefs such as 1) Salvation by Christ alone not of works, 2) Inspiration of Scripture, 3) Deity of Christ, 3) eternal life, 4) the resurrection. However, upon these Christian fundamentals, there are a whole host of opinions such views of end times, spiritual gifts, forms of worship, diet, on and on. However, with our understanding of Chapters 1-13, we have a good grasp of the Christian faith. Therefore, we now have specific instructions to welcome the weak in faith and do not quarrel with them.