Today I started writing about another subject, but at the middle of the letter I saw that you would need more background to understand what I was talking about (well, this is really not true as you should know all, but sometimes even I have problems understanding my thoughts, so I saw it fit to write this letter first).
We are taught at school that there are different states of matter: Solid, Liquid, Gas, etc. And everything is made up of atoms, which in turn are composed by electrons, protons, and neutrons. An atom is composed of a nucleus and a cloud of electrons surrounding it. The interesting thing is that the size of the atom (where the electron cloud ends) is around 10.000 times the size of the nucleus (and even more for light elements like gases). So it you think about it, there is a LOT of empty space out there. Actually, most of what we are is empty space.
So how can we feel stuff? If we are made up of so much empty space, why can’t we see or walk through walls? Why does it hurt when you accidentally slam a hammer against your finger while hammering a nail? Because matter is not what matters (no pun intended). The reason we can’t walk through walls, and that we can touch things, is energy. While there is a lot of space between the electron cloud and the nucleus, this space is like a demilitarized zone that is protected by the forces of the atom. Things simply cannot go inside this space without having to exert immense forces. And this energy also varies between elements and molecules, so we have solids, liquids, gas, etc.
It turns out that everything we sense are the changes in forces and energies around us. Light is energy, sound is energy, and touch is also energy. And having that, why can’t we have “energy” sensors? Let’s take feelings for example. When a person feels sad, they are probably expelling lots of “sad” energies. So if we had “feeling” sensors, we would feel this energy coming to us.
I think we already have these sensors, but most of us are not aware of them.