 Buddhism originated in the historical figure of the Buddha (historically, Gautama Buddha or Siddhārtha Gautama, ca. 5th–4th century BCE). His teaching centered on ethics as well as metaphysics, incapsulated in the Four Noble Truths (on suffering and its origin in human desires), and the Noble Eightfold Path (right view, right aspiration, right speech, right action, right livelihood, right effort, right mindfulness, right concentration) to end suffering and to break the cycle of rebirths, culminating in reaching Nirvana. Substantive metaphysical teachings include belief in karma, the no-self, and the cycle of rebirth.