"but in demonstration of the Spirit and of power.” 1 Corinthians 2:2, 4 . AA 244.1"
"And my speech and my preaching was not with enticing words of man’s wisdom, but in demonstration of the Spirit and of power:"
The EGW passage directly quotes 1 Corinthians 2:4.
"Jesus, whom Paul was about to present before the Greeks in Corinth as the Christ, was a Jew of lowly origin, reared in a town proverbial for its wickedness. He had been rejected by His own nation and at last crucified as a malefactor. The Greeks believed that there was need of elevating the human race, but they regarded the study of philosophy and science as the only means of attaining to true elevation and honor. Could Paul lead them to believe that faith in the power of this obscure Jew would uplift and ennoble every power of the being? AA 244.2"
"He is despised and rejected of men; a man of sorrows, and acquainted with grief: and we hid as it were our faces from him; he was despised, and we esteemed him not."
Both passages discuss the rejection and low estimation of Jesus. EGW's passage highlights the difficulty Paul faced in presenting Jesus, a crucified Jew, to the Greeks, echoing the sentiment of Isaiah 53:3 regarding Jesus being despised and rejected.
"And Nathanael said unto him, Can there any good thing come out of Nazareth? Philip saith unto him, Come and see."
Both passages deal with prejudice against a person/place due to perceived lowliness and the potential for good to come from unexpected sources. The connection is thematic rather than a direct quote or allusion.