That is to say, if it isn't a person who has listened to the Original Vow of Amida Buddha in the past life, that person would not be able to have met the true Buddhism in this life and would not be able to earn the belief (be saved by Amida Buddha).
つまり、過去世に仏教、阿弥陀仏の本願を聞いてきた人でなければ、今生で真実の仏教に遇い、信心獲得する（阿弥陀仏に救われる）ことはできないということ。