The air as the origin of all things is necessarily an eternal, imperishable substance, but as soul it is also necessarily endowed with consciousness.

It is as if in looking at something, the poet discerns an eternal substance that is hidden behind the manifest sense impressions.

However, according to Aristotle's theology, a form of invariant form exists without matter, beyond the cosmos, powerless and oblivious, in the eternal substance of the unmoved movers.

This Barlaam held to be polytheistic, inasmuch as it postulated two eternal substances, a visible and an invisible God.

Early Buddhism adheres to a realistic approach which does not deny existence as such, but denies the existence of eternal and independent substances.

If, in philosophy, a subject supposes a non-historical presence, an eternal substance, then how could the subject be historicized without keeping the ahistorical, essential core of this subject on which change occurs?

She saw giant sandworms writhing on the desert world of Arrakis, and an eternal substance that the people called the Water of life.

Barlaam viewed this doctrine of "uncreated light" to be polytheistic because as it postulated two eternal substances, a visible and an invisible God.

David's philosophy was that everything could be divided among bodies, minds, and eternal substances.

He reduced all reality to three categories, namely bodies, minds, and eternal substances.