T.D. Jakes says that God eternally exists in three manifestations, not three persons. Greg Boyd says God knows some aspects of the future, but that other future events are outside of his knowledge. Creflo Dollar says because we are created in the image of God, we are little gods. Mormonism says God revealed new scripture to Joseph Smith that supersedes the Bible. Roman Catholicism says we are justified by faith, but not by faith alone. This world is a murky madness of true and false. For every doctrine we know to be true, there seems to be a hundred pretenders.
No wonder, then, that John tells us to “test the spirits” and Paul says, “test everything” (1 John 4:1, 1 Thessalonians 5:21). It is our sacred responsibility to examine every doctrine to determine if it is true or false. But how can we distinguish sound doctrine from false? How can we distinguish teachers of truth from teachers of error?