A person who has attained nibbana has permanently extinguished greed, hatred, and delusion, ending the cycle of rebirth and suffering.
The most fundamental distinction is the complete elimination of the three root defilements: greed (lobha), hatred (dosa), and delusion (moha). An ordinary person continues to experience these mental states, which drive craving and attachment. Someone who has attained nibbana has permanently uprooted these tendencies at the deepest level. The Dhammapada states that the arahant—the one who has reached nibbana—no longer experiences greed, ill will, or the delusions that bind others to existence.
An ordinary person is caught in samsara, the cycle of death and rebirth driven by karma. Each life is conditioned by past actions and craving. Someone who has attained nibbana will not be reborn. This does not mean annihilation of the person, but rather the natural conclusion of the process that generates new lives. Without craving and the defilements that propel rebirth, there is no mechanism to produce a new existence. In the early Buddhist texts, this is presented as a logical consequence, not a punishment or reward.
Ordinary people experience dukkha—suffering, unsatisfactoriness, and stress—in various forms: physical pain, emotional turmoil, and the deeper existential unsatisfactoriness of conditioned existence. Someone who has attained nibbana is liberated from this. The Second Noble Truth teaches that suffering arises from craving; when craving is completely extinguished, its effects cease. However, it should be noted that an arahant still experiences physical sensations (pain, pleasure) while alive, but does not suffer psychologically because they do not crave or resist experiences.
Those who have attained nibbana demonstrate distinctive mental qualities even in their daily life. They experience unshakeable equanimity, perfect wisdom regarding the nature of reality, and complete moral purity—not from external constraint but from the absence of the desires that would prompt unwholesome action. The Anguttara Nikaya describes the arahant as peaceful, having reached the highest happiness. Traditional texts emphasize that an arahant cannot intentionally break the precepts, not because of rules imposed from outside, but because the inner drive to do harm has been permanently eliminated.
An important clarification: an arahant who is still living does not gain superhuman powers or become emotionally flat. They still have a personality, preferences, and memories. They age and eventually die. The difference is internal—the absence of fundamental defilements and the certainty of no future rebirth. Different Buddhist traditions offer varying descriptions of what persists after the final passing of an arahant (whether consciousness continues in any form), but all agree that the person's engagement with the cycle of rebirth has ended.
The Theravada tradition identifies four stages of enlightenment, with the final stage being arahantship—the full attainment of nibbana. Mahayana traditions use different frameworks (such as bodhisattva stages) but maintain that nirvana represents the permanent cessation of greed, hatred, and delusion. There is also scholarly discussion about whether nibbana is attainable by ordinary beings in this lifetime or requires particular circumstances—a point on which Buddhist communities have historically disagreed, but the core definition of nibbana itself remains consistent across schools.