Guru is a Sanskrit term for a "mentor, guide, expert, or master" of certain knowledge or field. In pan-Indian traditions, a guru is more than a teacher: traditionally, the guru is a reverential figure to the disciple or student, with the guru serving as a "counselor, who helps mold values, shares experiential knowledge as much as literal knowledge, an exemplar in life, an inspirational source and who helps in the spiritual evolution of a student". Whatever language it is written in, Judith Simmer-Brown says that a tantric spiritual text is often codified in an obscure twilight language so that it cannot be understood by anyone without the verbal explanation of a qualified teacher, the guru. A guru is also one's spiritual guide, who helps one to discover the same potentialities that the guru has already realized.

Hinduism is an Indian religion or dharma, a religious and universal order by which its followers abide. The word Hindu is an exonym, and while Hinduism has been called the oldest religion in the world, it has also been described as sanātana dharma, a modern usage, based on the belief that its origins lie beyond human history, as revealed in the Hindu texts. Another endonym for Hinduism is Vaidika dharma.