A thing can only be a problem as long as you believe in it.
Now, think and don’t stop before you’ve seen the light. (Hint: think of evil witches, dragons, ghosts etc. Do you believe in them? Yes? Then they’re a problem for you. No? Then you laugh about them). (emphasis in original)
Well, just in case you needed further assurance that this kind of magical thinking is just wrong, Evil Monkey has a rather graphic demonstration up of just how incredibly, and painfully, wrong it is:
…by aligning one’s energy and going through ritualized moves, objects, chants, and breathing, one can prepare his or her mind and body to ward off blows. From swords.
Video included, though as he notes, if you don’t like blood, don’t watch.