Maitreya (Sanskrit), Metteyya (Pāli), or Jampa (Tibetan), is foretold as a future Buddha of this world in Buddhist eschatology. In some Buddhist literature, such as the Amitabha Sutra and the Lotus Sutra, he or she is referred to as Ajita Bodhisattva.
Maitreya is a bodhisattva who in the Buddhist tradition is to appear on Earth, achieve complete enlightenment, and teach the pure dharma. According to scriptures, Maitreya will be a successor of the historic Śākyamuni Buddha . The prophecy of the arrival of Maitreya references a time when the Dharma will have been forgotten on Jambudvipa. It is found in the canonical literature of all Buddhist sects (Theravāda, Mahāyāna, Vajrayāna), and is accepted by most Buddhists as a statement about an event that will take place when the Dharma will have been forgotten on Earth.
Maitreya currently resides in theTusita Heaven (Pāli: Tusita), said to be reachable through meditation. Śākyamuni Buddha also lived here before he was born into the world as all bodhisattvas live in the Tuṣita Heaven before they descend to the human realm to become Buddhas. Although all bodhisattvas are destined to become Buddhas, the concept of a bodhisattva differs greatly in Theravada and Mahayana Buddhism. In Theravada Buddhism, a bodhisattva is one who is striving for full enlightenment (Arahantship in Pali), whereas in Mahayana Buddhism, a bodhisattva is one who has already reached a very advanced state of grace or enlightenment but holds back from entering nirvana so that he may help others.