Ah, welcome to the world of intelligent energy, my friends. This is what has been called chi/qi, ki, prana, manna, light, breath, ether/aether, the holy spirit, inner/secret fire and so many other things. It is the fundamental 'life energy' which flows through all living things. I assure you all, it is very real, and it is very essential to our existence. It is the next frontier of both science and spirituality and has been known about for millenia, albeit kept a highly guarded secret due to the power that can be wielded through its understanding.
There are a ton of different ways to learn about this energy and to explore and experiment with it. I have worked with a few different ones although I have been most extensively trained with it through the Reiki system. I am also rather fond of Qi Gong.
I would offer an exercise to practice. Relax your chest by breathing out fully. The key to relaxing any part of the body is to breath out while focusing on it. Hold the breath out after releasing it all in order to ground.
Then breathe naturally and try to let your heartbeat rest. Take your palms and put them together in the style of prayer, this is called Gassho, 'prayer hands', in Reiki. Focus your mind on the feeling between your fingers, the point of contact. Try to feel the tension that is created there when your palms come together. Feel the connectivity between your hands and how it affects your shoulders and your chest.
Now trying very, very slowly and softly try to pull your palms apart. Trying to feel the magnetic pull of your hands actually wanting to stick together. Be sure to be breathing through this and don't let your breath get caught or held up. Breath is key, for it is bellows of the flow.
Pull your hands apart only a centimetre, keeping your awareness on the point of contact, where your fingers had been touching. You keep your focus on the 'surface' of your skin, not on the inside of your fingers. Then try to extend that awareness from the surface to the space in between your hands. It's not empty, there is air there. The air will be the first element affected by the 'inner fire' or 'secret fire'. The heat is intelligent and it moves with your magnetic field, generated by your heart. The alignment between breath and heartbeat in rhythm is the key to power.
Feel between your hands and move your consciousness from one side to the next. By that I mean starting with your dominant hand take your focus from the surface of your palm and move it through the air across to the surface of the other palm. Then move it back the same way to the dominant hand. The dominant hand 'projects' energy, so use it as the initiator, you 'push' with your dominant hand. The second hand 'pulls'. These are analogous to the Positive and Negative poles in a battery. You are creating a sort of battery.
Do this over and over, 'swirling the air with your mind' or circulating the light as it might be call, between your palms. Then when you feel comfortable you can gradually increase the space between your palms and create a larger and larger circulation. If you want to experiment you can then form it in to different shapes such as spheres, squares, etc by visualizating that it is in that shape and 'looking at it with intent'. It is your Will that changes the Form.
This is a good exercise to start developing a feeling for this particular type of intelligent energy I have found.
As an aside, I also have the book Hands of Light but since I got it after my Reiki training I admit I haven't really read it. I've heard lots of good things about it though so I'm sure I'll get around to it.
@One Of Love: I also think that C_A would really get a kick out of this book.
https://yoursacredanatomy.com/about/sacred-anatomy/