A.T. Robertson Commentary Acts 28:24

"And some believed the things which were spoken, and some disbelieved." — Acts 28:24 (ASV)

Some believed (ο μεν επειθοντο). Imperfect passive indicative of πειθω. More exactly, "some began to be persuaded" (inchoative).

Some disbelieved (ο δε ηπιστουν). Imperfect active of απιστεω, to disbelieve, continued to disbelieve. It is usually so.