The following two illustrate this point: first of all, there was no opportunity to become enlightened because one has ever been reincarnating repeatedly and ridden with sins and misdeeds, and second of all, Amitabha Buddha will deliver even the sinful souls.
次の二つがあげられ、一つに自身が罪悪不善の身でいつから輪廻を繰り返してるかもわからず悟りを得る機会がなかったこと、二つに罪人である自分を阿弥陀仏が救ってくれること。