In Advaita Vedanta, the role of a guru, or spiritual teacher, is considered crucial in the journey towards self-realization and understanding of ultimate reality. The guru is seen as a guide, a mentor, and a source of wisdom and knowledge.

The guru in Advaita Vedanta is not just a teacher in the conventional sense, but is believed to possess a deep understanding and direct experience of the ultimate reality, Brahman. This makes the guru an embodiment of the truth and a living example of the non-dualistic philosophy.

According to Advaita Vedanta, the ultimate goal of human life is to realize the true self, Atman, which is identical to Brahman. However, due to ignorance and illusion, individuals are unable to recognize this truth on their own. This is where the guru plays a crucial role.

The guru, through his or her teachings and guidance, helps the disciple to overcome ignorance and recognize the true nature of the self. The guru is seen as a mirror that reflects the true self to the disciple, helping them to transcend their limited understanding and experience the oneness of all existence.

The relationship between the guru and disciple is considered sacred and is based on trust, devotion, and surrender. The disciple must have complete faith in the guru and follow their teachings with utmost sincerity. The guru, in turn, takes on the responsibility of guiding the disciple towards self-realization.

In Advaita Vedanta, the guru is also seen as a source of grace and blessings. It is believed that the guru's presence and blessings can accelerate the disciple's spiritual progress and help them overcome any obstacles on their path.

However, it is important to note that the guru is not seen as a mediator between the individual and Brahman. The guru is simply a guide who helps the disciple to realize their own true nature, which is already present within them.

In conclusion, the role of a guru in Advaita Vedanta is to guide the disciple towards self-realization and understanding of ultimate reality. The guru is seen as a source of knowledge, grace, and blessings, and is an essential part of the journey towards non-dualistic understanding and experience.