Evil Dreams…

“When you have a bad dream never examine what you saw, how you saw it or whether you’re guilty or how much you may be at fault. The evil one having failed to tempt you during the day tempts you at night. Sometimes God permits the devil to tempt us in our sleep so that we may see the old self is not entirely died. Other times the enemy approaches a person in his sleep and prevents various dreams in order to upset him when he awakes. This is why you should pay any attention to them. Cross yourself and the pillow, place a cross and an icon on your pillow and say the Jesus Prayer til you fall asleep.”
Elder Paisios
~Spiritual Struggle