What is True Enlightenment?
In Buddhism, the original meaning of Buddha is enlightenment, which has three levels:
The first is self-enlightenment, that is, self-realization of one's own nature; the second is enlightenment of others, that is, teaching Dharma to enlighten people; the third is perfection in practice.
Among the Yaanatraya Buddha School, the Pratyeka-buddha School focuses on causality for enlightenment, also known as the solitary enlightenment vehicle. It does not have clear hierarchical levels and shall not be discussed first.
Sravaka School, also known as Hinayana, achieves Arhat Fruit, which is self-enlightenment and also True Enlightenment;
Bodhisattva Dharma School, also called Mahayana, realizes enlightenment, which is self-enlightenment and enlightenment of others, considered equal to True Enlightenment but not yet truly becoming a Buddha;
