In Jain Darshan, both Siddhi (state of Siddha) and Loka (universe) are called anant (infinite) and nitya (eternal), but for different reasons.

I’ll explain very simply:

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1. Why Siddhi is anant (infinite)?

Siddhi = state of liberated souls (Siddhas) staying forever in Siddha‑śilā.

• From beginningless time (anādi kāl), in every time-cycle, some souls keep attaining moksha.
• This has been happening since endless past and will keep happening in endless future.
• So the number of Siddha souls is without limit – anant (actually often described as “asaṅkhyāt-anant”).
• Each Siddha has:

- anant jñān (infinite knowledge) - anant darshan (infinite perception) - anant sukha (infinite bliss) - anant vīrya (infinite energy)

• Once a soul becomes Siddha, it never falls back, never takes birth again.
• So Siddhi is nitya (eternal): the state of Siddhahood never ends, and Siddhas remain forever in Siddha‑loka.

Both Digambar and Shwetambar agree on:

• Infinite number of Siddhas
• Eternal existence of Siddhas in Siddha‑śilā

(only some small details in descriptions may differ).

You can read more about Siddhas and moksha here and here .

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2. Why Loka is anant (infinite)?

Here “Loka” means the whole universe – all substances (dravyas): jīva, pudgal, dharmāstikāy, adharmāstikāy, ākāś, kāl.

• Each dravya has anant pradeś (infinitely many space-points).
• So the total universe is said to be anant in pradeś, hence in that sense anant.
• Also, time (kāl) is beginningless and endless → anant.

So:

• No first moment of loka,
• No last moment of loka,
• No “creation” and no “destruction” of the universe – it only changes its modes (paryāy).

That is why Jain Agams say loka is anādi–anant.

You can see a simple explanation of loka and its structure here .

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3. Why Siddhi and Loka are nitya (eternal)?

In Jain philosophy, every dravya (substance) has:

• Nitya dravya – it never gets destroyed, it only changes forms.
• Anitya paryāy – the modes (conditions) keep changing.

(a) Loka is nitya because:

• Loka = collection of all eternal dravyas.
• Dravyas never end, so loka as a whole is also nitya.
• Only forms (birth–death, growth–decay, etc.) change.

(b) Siddhi is nitya because:

• Siddhi = particular pure state of the soul when all karmas are finished.
• After this, no new karma can bind, no new body, no rebirth.
• So that state remains forever – once Siddha, always Siddha.

Thus:

• Siddhi is anant → infinite Siddhas + infinite qualities.
• Siddhi is nitya → Siddha‑state never ends.
• Loka is anant → infinite space-points, infinite time.
• Loka is nitya → universe never created, never destroyed.

This is the core Jain view in both Shwetambar and Digambar traditions (with only minor technical variations in descriptions).