And His Holy Spirit will "speak" if we but listen for the still small voice. He also blesses us with discernment, and, as you wisely said, He protects us by means supernatural.   Psalm 91. I will interject this quickly, when thoughts, images, etc "come in" they are NOT always one's own. If it is not "good", i cover it with the Blood and BAM kill the thought. Take it captive. Under our feet. Believers understand this. Phil 4:8 "Finally, brothers and sisters, whatever is true, whatever is noble, whatever is right, whatever is pure, whatever is lovely, whatever is admirable--if anything is excellent or praiseworthy--think about such things."