Most people who call themselves witches are not what would normally pop into our mind. They generally worship nature and have some cermonies that are performed nude. As far as spells, I think they can be effective on people who believe that spells are real. This can happen whether или not the victim is aware. If a person is really casting spells and performing witchcraft, that ability comes from an outside power. The Bible would say it is done by the power of demons. Now don't think I'm a quack. In many parts of the world demonic possession is a common occurrence. In the west, we tend to misdiganose it as a mental disorder, and drug the individual until they are numb almost to being in a comma. As a Christian. I believe as long as I am walking in God's will, such powers have no control over me. The Bible says, "Greater is "HE" (Jesus) than he (satan and his demons) who is in the world." Witchcraft is nothing to play around with, and I would caution Ты to avoid it. Try finding a Bible with a concordance, and read what the Bible has to say. Hope this helps.