 Some Christians believe that spiritual attacks can cause bouts of unexplained physical ailments, panic attacks, depression or suicidal thoughts, temptation, and spiritual discouragement, among other conditions.The most extreme example of a spiritual attack is demonic possession, during which the person being attacked may have little to no control over his or her actions.Some Evangelical denominations believe that actual demonic possession is not possible if one has already professed their faith in Christ, because the Holy Spirit already occupies the body and a demon cannot enter.