Thingness is a kind of illusion of scale and velocity. When a bunch of energy is held tightly together and when our instruments for observation are too blunt and slow then the energy appears stationary or solid--appears to us to be a thing. We loose the aliveness that always is going on. Things seem dead only because we cannot see at the needed resolution and rate of observation.
I'm not convinced there are things at all. We people make Distinctions that arbitrarily or imaginatively and usefully make things up out of pure energy.