Yeah, you can change the way you seem to feel if you think about it. If you get a papercut and keep thinking about how much it hurts, you're going to report feeling a lot more pain than if you thought about something else. If you're full of energy and start thinking about relaxing thoughts, you might lose some of your energy. That's not supernatural. That's just your thoughts in your head.

Besides, what do you mean by "energy"? Can you actually define it? Because I hear it a lot in spiritualist new-age mumbo-jumbo as a buzzword, but no one seems to be able to tell us what it means. It seems to refer to some invisible force field that nobody can detect with any instrumentation of any kind, but they know it's there because they can "feel" it. (Except, of course, when their ability to feel anything is scientifically tested by third grade girls... JAMA -- A Close Look at Therapeutic Touch, April 1, 1998, Rosa et al. 279 (13): 1005 )

Energy is something that can be converted into matter and something matter can be converted to. It can be measured with observational devices, and its movement can be explained by mathematical laws. The spiritualists' energy, the kind that doesn't equal mc², that energy doesn't exist. We have brains, with physical energy in it, but fundamentally that energy is no different from the kind that's flowing through the power lines. It has no thought, it has no personality, and it has no magical superpowers. It's just moving around influencing the behavior of the particles it encounters.