Now, please understand, I chant the Sanskrit verse because of its beauty. Being chanted in the language called Sanskrit does not mean that it is identified with any narrow sect or creed called Hinduism. It is an ancient language. Great works have been written in it. Just because something is written in Sanskrit, it is no ground to dismiss it as Hindu or this or that.
So, the meaning of this verse is, that supreme reality, that supreme consciousness, that ultimate reality or the truth pervades everything here and now. Idam sarvam meaning here, not hereafter or before but here, which means right now. This means there is no time when this Supreme Isha has not pervaded the entire Universe.
Yatkincha jagatyaam means it pervades everything that moves and, therefore, is called jagat. The word jagat or the universe comes from the root, jagatyaam which means that which moves. Now, this is a physical truth too.
There is nothing that does not move—the planets move around the sun; entire galaxies move; the electrons move around the neutrons; the water in the river move, night moves away to give rise to day. ‘This’ changes into ‘that’, ‘what was’ becomes ‘what is’ and then ‘what is to be’.
Look at everything and you will see that there is nothing that does not move. Everything moves. What we normally call dead matter, examine it carefully with a microscope, and you will see it moving and moving and moving inside.
Innumerable living beings live, for instance, in a clod of earth that appears to us to be motionless. And, apart from that, if you go deeper, even a stone or a rock that appears to us to be dead, at inertia, is full of movement because inside their atoms the electrons move. The molecules of all the living things move, living or non-living. Chemical reactions are movements of the molecules.