Energy is in real life, though most people don't believe in it. I'll simply explain it as... when you look at someone, how do you know that they're angry? Other than their facial features. If you had someone stand in front of you, and you couldn't see their specific features, how do you know they're angry? I'm sure that's happened to you before. Or, someone looks happy, but they... feel... angry. Or they're about to be angry. Science has actually explained there are auras, and there's scientific proof that all living beings give off auras (Dang it. I always thought it was cool to not know, and keep it as 'magic'. :( Oh well, at least now I can get scientific help to teach me to see auras better than I already can. xD)
In the roleplay, I can't really explain the fourth dimension very well. I'll explain the visual, as I've seen a video representation of it. The fourth dimension is the same as the third in every way, but one (Not in the RP though, it's close, but there's a few more extra magical stuff.) In the first dimension, there are two directions. Back and forth. A straight line. The second dimension get's more complicated, with four directions. Forward, back, left, and right. We humans see two dimensions, and don't even see 3d. It's just we perceive 3d as we can move our three dimensional bodies in our three dimensional world, and get to see other perspectives of objects as we, or they, move around. The third dimension is the one we know of the most, up, down, left, right, forward, and back. We can't see three dimension... you might think we can, but we can't. An easy example of this, is close one eye, hold it shut with your hand, and walk around your house. Things look different, right? Slight differences... looks almost flat, right? We can't see 3d, because we can't see an ENTIRE 3d being at one time! If you hold paper in front of you, you see the front. If you hold it at an angle, you can see multiple sides, AND the front. If you hold it on it's side between your nose, you can see the sides, the front, and the back... not not the other side. And, you're seeing the front and back with multiple eyes, so you wouldn't even see that much with one eye.
The fourth dimension get's a little trickier, as you can't describe it. Yes, here we go... it has six directions! Up, down, left, right, forward, back, BLAH, and BLUH. BLAH and BLUH is IMPOSSIBLE for humans to comprehend... we just can't fathom it! Can you? No. It doesn't exist, does it? Not even possible! Well, it's there. We don't know where, or in what form, or how, but it's there. We can only assume fourth dimensional beings would naturally see in 3d... that means seeing our ENTIRE BODY at one time! Seeing our inners, out outers... everything at once! Creepy, eh? Plus, they would be able to perceive the fourth dimension, the BLAH and BLUH directions. Plus, since their bodies would also be made out of materials in these two new directions, they would also be able to move in those directions as well.
Let's go back. 1d. See it. A straight line. Left. Right. Nothing else. Now, 2d. A small square on your screen. Stretch it, make it a circle. Now, make 3d... you can make a full sized cube, stretch it, make a rectangle in your mind. Make it an orb (Kinda hard one...), make it all these wonderful shapes! Now, 4d, make a cube. A simple cube. And imagine you can stretch it... but it's still a 4d cube! As you stretch it, parts disappear, parts reappear, and there's always some gap between some of the sides and faces. If we could see 4d, even for a milisecond, we would see it for the rest of our lives. This is why I cannot fully explain it, as it's impossible as 3d beings. A 2d being can't imagine up and down. But, a 3d being can move that object into the 3rd dimension, and it will become fully aware of it for the rest of it's life. It might try to explain it, but it won't be able to to others. A 4th dimensional being might do that to us... but why? It would either A: be cruel. B: be scary. C: ALIEN ABDUCTION! No, I'm kidding on that last one. If aliens are real... they probably wouldn't be fourth dimensional.
Now, in my religion, we actually believe in ghosts, and fairies, and magic, and all sorts of stupid crazy stuff like that. We don't believe in this next part, but it's cool to think about. Ghosts, and fairies... what if they're simply fourth dimensional beings? It would makes sense, since they can change their shape and form to LOOK 3d, so we can actually comprehend them. But, where do they go afterwards? Why doesn't absolutely everyone see them all the time? That's simple. Walk in BLAH or BLUH direction... even a FRACTION of it... and they disappear. If you're flat, and you can't see up or down, EVERY other creature in your plane of existence has to be either in front, to the sides, or behind you. If they're up or down, your'll never know they're there for the rest of your life. You might even think they're ghosts!
Here's a picture I found that's a 4th dimensional cube. Or, a 3d cube made to LOOK 4d.
I'm sorry, ignore this video real quick. I can't find the right one. This one is a bad one, since it simplifies the 4th dimension as time... which is false.
A video I found.
https://www.youtube.com/watch?v=MN4KC_zlW4g
This here is the real video. This video is amazing, and can get you to understand much better. Just keep in mind the spinning 4d objects are only ever moved in 3d, so they look 3d, and never 4d. They just look extremely funky. But it is as close as we can ever get to seeing 4d.
https://www.youtube.com/watch?v=rG6aIVGquOg