The Great Vehicle … teaches that there is only one true and perfect enlightenment, that of the Buddha. Anyone who achieves it becomes a Buddha, too. The Lotus Sutra teaches that everyone – whether they be “hearers,” “private Buddhas,” or Bodhisattvas – can attain true perfect enlightenment and become Buddhas. This perfect enlightenment of the Buddha is called anuttara-samyak-sambodhi.
A key idea of the Lotus Sutra is that the three separate vehicles of “hearers,” “private Buddhas,” and Bodhisattvas are united in One Vehicle, the Buddha Vehicle.
Introduction to the Lotus Sutra