「精神的(せいしんてき)に向上心(こうじょうしん)のないものは馬鹿(ばか)だ」という言葉

Panicked by K's confession, Sensei chose the path of betraying him. Taking advantage of K's own past words, 'One who has no spiritual desire for improvement is a fool,' Sensei coldly criticized K, asserting that his love for Ojosan contradicted his spiritual path. Then, while K was agonizing, Sensei directly requested the widow's permission to marry Ojosan, establishing their engagement behind K's back.