In Panosophy, Parousia is a synonym of Presence, with the same Proto-Indo-European roots, literally meaning ‘before being’ or ‘prior to existence’, as the Absolute.
In spiritual terms, as none of us is ever separate from the Immortal Ground of Being that we all share for an instant, Parousia is ever-present, denoting that we are all Christ, with inseparable Divine and human identities, in a primary-secondary relationship.
Realizing that our unique human souls are indivisible from the Essence or Soul of the Cosmos is absolutely essential at the present time, as we are rapidly carried to our inevitable extinction as a species, most probably due to abrupt, irreversible climate change.
Following Plato, parousiā can also denote the universal human, with each of us, as particular individuals, sharing in and enjoying our common purpose as a species, in the Presence of the Divine, as Love.
Used in English since 1875, imported from parousiā in the Greek New Testament, where the word is used sixteen times to denote ‘the second coming of Christ’, from Greek parousiā ‘presence, arrival, official visit, especially that of a royal or official personage’, from para- ‘beside, near’, from PIE base per-¹, and ousiā ‘essence’, from on, genitive ontos, present participle of einai ‘to be’, from PIE base *es-. ‘to be’.
Plato used parousiā to distinguish Forms, as universals, and particulars, by saying that the former ‘have presence’, while the latter ‘share in’ or ‘partake of’ the Form, from the Greek metechō, also meaning ‘to enjoy with others’.