Akasha is the infinite, omnipresent and manifesting material of existence. Everything that has form, everything that is the result of compounds, is evolved out of Akasha. It is Akasha that becomes air, that becomes liquids, that becomes solids; it is Akasha that becomes plants, every form that we see, everything which can be sensed, everything that exists. It itself cannot be perceived; it is so subtle that it is beyond all ordinary perception; it can only be seen when it has become gross, has taken form. At the beginning of creation there is only Akasha; at the end of the cycle, the solids, the liquids, and the gases all melt into Akasha again, and the next creation similarly proceeds out of Akasha.
At the beginning and at the end of a cycle, everything becomes Akasha, and all the forces that are in the multiverse resolve back into Prana; in the next cycle, out of Prana is evolved everything that we call energy, everything that we call force, everything that we call magic. It is Prana that is manifesting as motion; it is Prana that is manifesting as gravitation, as magnetism, as quantum mechanics.
All the energies that are now displayed in the multiverse we know, by modern science, are unchangeable. The sum-total of the energies in the multiverse remains the same throughout, only, at the end of a cycle, these energies quiet down, become potential, and, at the beginning of the next cycle, they start up, strike upon Akasha, and out of Akasha evolve into various forms and as Akasha changes, Prana changes, and Zima changes also into all these manifestations of energies.