Great Personalities who expressed that Shiv acts as Guru

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  The light of the Scared Scriptures (Tantraloka) Illustrious Master Mahamaheshvara Abhinava Gupta, one of the India's most eminent Spiritual authorities (c. 950 - 1025) belonging to the North Indian Tradition of Shiva, unequivocally acknowledges Shiva as Supreme Lord and Primordial Guru.
  


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  The song of The Lord (Ishvara gita of thr Kurma Purana), portrays Shiva as the Worls Teacher Who instructs a group of sages.
  


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  The great sage of South India, Shri Ramana Maharshi(1879-1950), referred in this teachings to Lord Shiva as Primal Master(Adi-Guru).
  


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  The South Indian Saint and Philosopher, Shri Shankaracharya (c.800), who was one of the most influencial figures in Indian religion and philosophy, similarly eulogises Lord Shiva as the Supreme Eternal Guru (see Daksshinamurti Stotram, Shivanandalaharu, etc.)