Adi Sri Shankara creates the Smarta tradition

Adi Sankara, “founder of the six-sect system.” popularized the ancient Smārta five-Deity altar—Gaṇapati, Sūrya, Vishṇu, Śiva and Śakti, and added Kumāra.

Image of Satguru Sivaya Subramuniyaswami
To transcend the mind and reach the ultimate goal, seekers need the guidance of a satguru, an enlightened master who has followed the path to its natural end and can lead them to the Divine within themselves.
—Gurudeva