Getting a reiki attunement will connect you to a particular energy and is part of a process with in a system. What is this energy? Can it be measured at the source? Or during the transfer? No, but it can be measured at the result, where it ends up. The person receiving the reiki attunement or session have been tested by science to prove that changes have occurred.
If you think this is the placebo effect it is not. Because these physical effects have been measured in people who had no idea they were receiving the reiki treatment. If so, how come we think that a reiki attunement uses energy: no energy can be detected?
The reason why we consider that a reiki attunement or session transfers energy is that perhaps everything boils down to energy on the physical level. Here you can learn more about the reiki attunement system with the highest frequency: reiki attunement
On the level of the spirit, however, nothing actually exists. Quantum Physics talks about this spiritual level as the zero-point field.
Apparently this is actually were all of material reality comes from. It is zero like the big bang, like the origins of the universe, that mathematically boils down to zero. This is the ultimate mathematical and philosophical problem as zero can not be calculated and therefor can not be known, which means god will always be a mystery.
The source of all things material comes from zero, zero is the source.
A lot of the time both the giver and the receiver feel tingling and warmth when a reiki master becomes the channel for the reiki energy and it would seem to appear to be energy.
But on the spiritual level reality is probably being rearrangement. Our essential nature is the same as the source. It is perfect, and we are becoming perfect again. Since the source is unconditional love, what this means is that during a reiki attunement this source energy translates into a rearrangement of atoms.
Basically Creation is perfection. Right now, all things that have ever been, or will ever be exist at this moment. Like through a reiki attunement, all we have to do is connect to it again. You will than begin to become a little like god, and that is perfection. Here you can learn more about the system with a great reiki attunement: reiki attunement