These are the doctrines the Bible says are necessary. Though there are many other important doctrines, these three are the only ones that are declared by Scripture to be essential. This is the spirit of the Antichrist, which you have heard is coming and even now is already in the world. For if you do not believe that I am, you will die in your sins. It is not simply enough to have faith.
Faith is only as valid as what it is put in.
You must put your faith in the proper object. If you put your faith in a vacuum cleaner, then you will be in a lot of trouble on the day of judgment. It is in something that can't save you. They are all coeternal, and of the same nature. Mormons believe that many gods exist though they serve and worship only one.