Howbeit when he, the Spirit of truth, is come, he will guide you into all truth: for he shall not speak of himself; but whatsoever he shall hear, that shall he speak: and he will shew you things to come. John 16:13
You have the Spirit of truth in you, so you can't be deceive. His only mission is to guide you into all truth...Note: not some truth, but all truth. This are truth that pertained to the foundation of your Christian life here on earth.