Tat tvam asi mahavakya

What is timeless has to exist in all periods of time

Ishvara has to be timeless, since ishvara himself is time, while at the same time being free from time.

Ishvara is satchitananda svarupa, the one in whom time exists, time being a manifestation, with a name and a form.

Space is also a manifestation with a name and a form.

The various beings, the devatas, the elements, the natural world, the living beings, are all a manifestation with names and forms.

These manifestations appear and then resolves into unmanifest state.

The knower, the seer , in a jiva, is none other than the same ishvara who is the truth of the manifest state of all that is here as well.

He himself is the truth of the manifestation.

I myself am the reality of this manifestation.

Hence I am timeless, I am limitless, self existent consciousness.

Entire universe resolves in me. Manifests in me and resolves in me.

The manifestation is mithya, and the unmanifest is also mithya.

Mithya means in terms of reality it has no reality of its own, its reality is sachidananada brahman.

So its just a name and form, when we say 'is' , the 'is' refers to brahman the self.

Thereby I am not a jiva, I am brahman, the reality, of all that is here. I myself being free from name and form.