Which belief system is characterized by the belief that one can reach Nirvana through life's cycle?

The belief system characterized by the understanding that one can reach Nirvana through the cycle of life and rebirth is Buddhism. In Buddhism, Nirvana represents the ultimate goal, a state of liberation from suffering and the cyclic existence of samsara, which includes birth, death, and rebirth. This philosophy teaches that through ethical conduct, meditation, and wisdom, an individual can transcend worldly attachments and desires, eventually achieving Nirvana.

While Hinduism also shares concepts of karma and reincarnation, and aims for moksha, which is a similar liberation, Nirvana is specifically a Buddhist term and reflects the unique insights of Buddhist teachings about enlightenment and the cessation of suffering. Christianity and Islam, on the other hand, do not have concepts of Nirvana and instead focus on salvation and the afterlife in different ways.