*The electron has a mass, but it is a wave. It is a particle and a wave, and it is made of something like energy-mass, I think. A neutron is kind of like a proton and an electron in one (LOVE! sigh.). The stuff that makes up a proton and a neutron - well, I don't know what it is.
"The space between" is the constant. The Void and Tao.
As I understand it, we westerners focus on that "particle/wave", expressions of energy from the string theory to the Universe/Omniverse.
But, as I said, it is the "space" which is constant.
Eastern mysticism tends to... "become that space".
Go for the space manna and you may become that blanket, that blanket that nurses all of being and non-being; "that which is and that which is not".
Chuang Tzu is worth a read.
Matj
"Without light or guide, save that which burned in my heart." San Juan de la Cruz.