I am amazed at how willfully ignorant people can be on the clear teaching about angels and demons (fallen angels) in the Bible. Do you know how many false religions and cults have been started because someone said that an angel came and told then something? The Apostle Paul said in Galatians 1:6-8, “I marvel that ye are so soon removed from him that called you into the grace of Christ unto another gospel: Which is not another; but there be some that trouble you, and would pervert the gospel of Christ. But though we, or an angel from heaven, preach any other gospel unto you than that which we have preached unto you, let him be accursed.”
That means that if an angel, heavenly or demonic, (it will be demonic) was to stand at the foot of your bed tonight and tell you something that is not in the Bible; don’t you believe it because he is lying and he is accursed by God.