Full context:   Nirvana ends the cycle of Dukkha and rebirth in the six realms of saṃsāra.[note 2] It is part of the Four Noble Truths doctrine of Buddhism, which plays an essential role in Theravada Buddhism. Nirvana has been described in Buddhist texts in a manner similar to other Indian religions, as the state of complete liberation, nirvana, highest happiness, bliss, fearless, freedom, dukkha-less, permanence, non-dependent origination, unfathomable, indescribable. It has also been described as a state of release marked by "emptiness" and realization of non-Self. Such descriptions, states Peter Harvey, are contested by scholars because nirvana in Buddhism is ultimately described as a state of "stopped consciousness (blown out), but one that is not non-existent", and "it seems impossible to imagine what awareness devoid of any object would be like".