The Apostle John urges us to be absolutely clear as to what we believe & what we consider of God. I like what John Flavel says about some of these things:

“The truths that Christ teaches have his character and image stamped upon them. Would you like to test whether this or that doctrine is from the Spirit of Christ or not? Examine it by this rule: whatever doctrine you find to encourage and countenance sin, to exalt self, to be accommodating to the world’s designs, and that bends to the humors and lusts of men – you may safely reject. Whatever doctrine makes those who profess it to be carnal, proud and sensual you may safely conclude never came from Jesus Christ. The doctrines of Christ lead to godliness; his truth sanctifies. Do not swallow everything, even if it comes so dearly that does not have some relish of Christ and holiness in it. Be sure, Christ never revealed anything that detracts from his glory or obstructs the purpose of his death.”  (Flavel, Works I, pp.128 – 130)