The Sutra of the EIGHT REALIZATIONS of Great Beings
Aniruddha, one of the Buddha's best ten disciples, asked the Buddha to give a sermon on how to attain enlightenment and nirvana. The Buddha compassionately talked about eight methods which the bodhisattvas applied to attain enlightenment. After Aniruddha heard these methods, he constantly pondered them. Finally, he fully realized the truth of human life and discovered the path to enlightenment.