This one I knew was quite entrenched, and was hiding very well. I believe that all of my thoughts have been tainted by this guy. I made an effort to lift him out, and it might as well been a 200 pound weight dredged up all inside my body and so ingrained into me not unlike the tares that grow up entangled with the wheat. (Doctrine and Covenants Section 86 found on lds.org/scriptures).
Nevertheless, I knew it had to go. So the past 2 days I have been commanding it to depart, but it was so entrenched, it went nowhere.
As I went to sleep after getting a priesthood blessing, I became more in tune to how it was influencing every single one of my thoughts and was amazed I couldn't see it before now. Finally in the morning, I got up and looked in the mirror. I started voicing my thoughts. I knew if I looked into the mirror I would be able to see which thoughts are from God and which are from Satan, because my eyes are clear and blue when it is God and they go dark and fierce when it is Satan. As soon as my eyes went dark I started saying, "Satan, you are no longer wanted and I command you to depart in the name of Jesus Christ, my Master." Over and over again I repeated. It helped some, and my eyes went blue again, but I just knew that the devil was still hiding in me. After a half hour I went back to bed, realizing I had done all that I could do for one night.
I immediately started dreaming of going to class. I sat in a seat in the corner and my friend sat behind me. I had to go to another class, and then I went upstairs to another class, but I saw on a clock that I was late so I went back to my first class. (The different classes represent my different personalities getting connected together, and the upstairs class represents getting help from the Lord). As I entered the first classroom, I saw another girl sitting in my chair. She was beautiful and innocent and I was tempted to just let her have it, but for some reason that was my chair and I needed to be in it, so I tapped her and said, "you need to get out of my seat, that is my chair." (The beautiful young girl represented Satan sitting in my heart and taking control of it).
Instantly I woke up from my dream and had a vision. I started seeing in my mind's eye a scene. I saw the monster that was in me. Most of the times they are small pixie devils, but this one was bigger, like the size of a jug of milk, right in the seat of my heart. He said, "I have the power to make her go insane. I will make her go insane. I will take away all of her senses until she ends up in the mental hospital." I could hear this buzzing and my thoughts were cloudy and fuzzy.
I replied strongly, "Even if you do make me go insane, I will not cease to command you to depart in the name of Jesus Christ my Master, no matter what you do to me I will never give up casting you out of me in the name of my Master Jesus Christ."
At this point I heard a Lion roar, like it was tearing in pieces and completely annihilating its prey (Micah5:8). The buzzing sound was still going on, but that Lion was roaring against it. I asked Robert to hold my hand and help me cast out this demon. I felt Robert's hands on mine, and as I came to from my dream/vision, I realized it wasn't Robert, he was still asleep, but it was the Lord holding my hands as real as anything. I then saw in my mind a light descending, which was the Holy Spirit that I have been longing to receive in all of me.
I testify that there is no need to fear the enemy. Jesus Christ is more powerful than Satan. It is essential we put our trust in His great righteousness; discern which of our thoughts are not loyal to Him; and no longer entertain them in our souls, but cast them out through the great righteousness and power of the Lord Almighty, the Redeemer Jesus the Christ.
Some scriptures that come to mind:
And because of my mourning and lamentation ye have gathered yourselves together, and do marvel; yea, and ye have great need to marvel; yea, ye ought to marvel because ye are given away that the devil has got so great hold upon your hearts. (Helaman 7:15, Book of Mormon. lds.org/scriptures, emphasis added)
Therefore, hold up your light that it may shine unto the world. Behold I am the light which ye shall hold up—that which ye have seen me do. Behold ye see that I have prayed unto the Father, and ye all have witnessed. (3rd Nephi 18:24, Book of Mormon. lds.org/scriptures, emphasis added).
And the Lord said, Simon, behold, Satan hath desired to have you, that he may sift you as wheat.(Luke 22:31, New Testament, lds.org/scriptures).
Let the wicked forsake his way, and the unrighteous man his thoughts: and let him return unto the Lord, and he will have mercy upon him; and to our God, for he will abundantly pardon. (Isaiah 55:7, Old Testament, lds.org/scriptures, emphasis added).