Correct Option
In Buddhism, Nirvana (Pali: Nibbana) is the ultimate goal, representing the cessation of suffering (dukkha) and the liberation from the cycle of rebirth (samsara). The "extinction of the flame of desire" accurately describes this concept. According to the Four Noble Truths, craving or desire (Trishna) is identified as the root cause of suffering. Nirvana is achieved by extinguishing these desires, attachments, and ignorance, leading to a state of profound peace and freedom.
Incorrect Options
Option 2: The complete annihilation of self.
Buddhism rejects the concept of a permanent, unchanging self (Atman) but does not advocate for the complete annihilation of the individual's existence or consciousness. Nirvana is the cessation of the illusion of self and the suffering associated with ego-centric views, not the destruction of the individual being. It signifies a transformation and liberation from the conditioned existence, not an obliteration.
Option 3: A state of bliss and rest.
While Nirvana brings profound peace and freedom from suffering, describing it merely as "a state of bliss and rest" is an incomplete characterization. It is a state achieved through the active extinguishing of craving and ignorance, leading to the absence of suffering. While peace and a form of ultimate happiness are outcomes, the core definition emphasizes the cessation of the causes of suffering rather than just a passive state of contentment.
Option 4: A mental stage beyond all comprehension.
While Nirvana is a profound and transcendental state, it is not considered entirely beyond all comprehension, especially for those who attain it. Buddhist teachings, particularly the Eightfold Path, provide a clear framework and practical methods for its realization. The concept is explained and understood within the Buddhist philosophical framework, even if its ultimate experiential nature is difficult to fully articulate in conventional language.