For dead people dont raise themselves from the dead. Dead people cant believe in Jesus Eph 2:5
5 Even when we were dead in sins, hath quickened us together with Christ, (by grace ye are saved)
Were dead in sins is in the present tense occurring at that time, its during that time Gods Grace quickened, made alive, that's effectual grace,
Hence they believe by Grace Eph 2:8; Acts 18:27 Dead people dont believe, they dead !