According to Nisargadatta Maharaj, enlightenment is the realization of one's true nature, which is pure consciousness or the "I am" presence. He defines it as the state of being fully aware of one's own being, beyond the limitations of the mind and body.

Maharaj explains that enlightenment is not something to be achieved or attained, but rather it is the recognition of what is already present within us. He emphasizes that it is not a state of mind or a temporary experience, but rather a constant state of being.

Enlightenment is often described as the end of suffering and the attainment of inner peace. However, Maharaj clarifies that it is not a state of perpetual bliss or happiness, but rather a state of being beyond all dualities and fluctuations of the mind.

He also stresses the importance of self-inquiry in the process of enlightenment. According to Maharaj, the key to enlightenment is to question and investigate the nature of one's own consciousness. By constantly asking oneself "Who am I?" and diving deep into the layers of the mind, one can eventually reach the state of pure awareness.

Maharaj also emphasizes the role of the guru or spiritual teacher in the path to enlightenment. He explains that a guru is necessary to guide and point out the illusions and limitations of the mind, and to help the seeker recognize their true nature.

Furthermore, Maharaj emphasizes that enlightenment is not a one-time event, but rather a continuous process of deepening and expanding one's understanding of the true self. He encourages seekers to constantly remain in the state of self-awareness and to let go of all attachments and identifications with the body and mind.

In conclusion, Nisargadatta Maharaj defines enlightenment as the realization of one's true nature, beyond the limitations of the mind and body. It is a constant state of being, achieved through self-inquiry and guidance from a guru. It is not a state of bliss or happiness, but rather a state of pure awareness and transcendence of all dualities.