Levitation is possible in means of anything being used for it. Just as a human can fly, but we don't wings or the capacity to use artificial wings.
You can look at different things like magnetism, 2 magnets of the same pole facing eachother repel each other, therefore if vertically held, it will cause a levitating effect.
Now, for a human to stand there, and start floating, with nothing but their own energy working, is not possible, it just doesn't work that way. Energy affects other energy, and gives the conditions for things to happen, but seeing as there is nothign to make you float, no matter what enerdy is there you will not float. Energy can however affect the possiblities of a ridiculously strong gust of wind to swoop you up, but that is rather unlikely in itself.