Can a spell(like magic) be just simple words and work? Why? How?

Question:

Can a spell(like magic) be just simple words and work? Why? How?

Im just starting out with this but I dont quite get how and why it works fully yet.

Best Answer - Chosen by Asker: Chances are your self image could be affected by a spell cast on you by anyone. If you believe it to be true, it is true. This is often called the Placebo effect and works! It is used in medical treatments all the time. It is used in blind studies, as a norm, to compare medicines.

We know the mind is very powerful. So a spell can work against you if you accept it as true. It cannot work against you if you don't believe in such things.