There is a groundbreaking theory within quantum mechanics that state all matter is a form of solidified light, which is held together by electromagnetic forces. All matter is made up of Atoms, which consists of protons, neutrons and electrons. At the centre of the atom, you have the nucleus, which is made up of protons and neutrons. The electrons are found outside of the nucleus, in orbits. These orbiting electrons are bound to the nucleus by photons, which are quantum electromagnetic radiation particles, with the photon being the particle for the electromagnetic forces. This Means - the photon serves as the glue holding the electron to the nucleus of an atom. Remember photons are light, as beings we are made of matter, which is made of atoms, which has photons, therefore, we are made of light.