The Danger of Believing God Speaks to Us through Our Own Thoughts

Son of man, prophesy against the prophets of Israel, prophesy and say to those who prophesy out of their own minds: 'Hear the word of the LORD!'  
 Thus says the Lord GOD, Woe to the foolish prophets who follow their own spirit, and have seen nothing! . . . They have spoken falsehood and divined a lie; they say, 'Says the LORD,' when the LORD has not sent them, and yet they expect him to fulfill their word. (Ezekiel 13:1-3, 5)