Sentence:  The variables of the Greek and the Jew are multiplied and affected by the idempotent reprise of the Jew or of the Messiah, who apparently returns, but who in reality comes for the very-first time, who <WSD>undercomes</WSD> or sub-venes (sous-vient). 
Meaning of the word marked with <WSD> tags:  To submit; submit to; subvene