The English word enlightenment and the Pali word bodhi both mean 'to wake up,' or 'to open the eyes.' When, as a result of practicing the Buddha's Dhamma, one deeply, fully and directly realizes the impermanent, inadequate and selfless nature of conditioned phenomenon one is said to have become or to have attained enlightenment. Quite automatically, this realization brings about a radical change in one’s experience and one’s behaviour. Frustration, anxiety and fear are replaced by peace and joy. A person who is enlightened is called either a Buddha or an arahant. The state itself is also often called Nibbana.
- Buddhism A to Z. Ven. Dhammika, 2007.