I think that meditation techniques are pretty close to magic. All we hear in the books about how magic works - clear your mind; determination, destination, deliberation; wand use for focus and not as a tool that has its own magic etc. - can be seen as descriptions of meditation. The difference is that being Muggles, we cannot read other people's thoughts, no matter how much we clear our minds, whereas the innate magic of wizards and witches allows them to do just that. And perhaps even some real life Muggles can achieve "magic" through meditation. ;) What I am saying is, the way Rowling describes how magic works is basically how meditation works in the real world.