At the place called as Naimisharanya, the sages were learning the vedas. They wanted to know the essence of vedas. So they started to Madurai. There is a Dakshinamoorthi at the temple. He is called as guru or the one who teaches and guides. He will be seated facing the south. He has 4 arms.
His upper right hand holds the rudraksha mala. Rudraksha bead got created from the tears that fell from Shiva's (Rudra's) eyes. His left eye is the moon (soma), right eye is the sun (surya) and the third eye is the fire (Agni). From his left eye 12 drops flowed, from his right eye 10 drops flowed and from his third eye 8 more drops flowed. So together there was 30 drops which formed the 30 beads of the rudraksha japa mala that is held in the upper right hand of guru. Rudra + aksham (from rudra's eye).
His lower right hand shows the chin mudra. In this mudra the index finger will be touching the thumb and the other three will be separated from the index finger. The thumb is paramatma, index finger is jivatma. The other three are Jealousy, Pride and Karma. This symbolises if jivatma leaves behind the three impurities jealousy, pride and karma, it reaches the paramatma.
His upper left hand holds the amrutha kalasa that stores the nectar which grants immortality. This symbolises that the guru will grant immortality to all those who completely surrender to him.
His lower left hand holds the knowledgeable books. Those books contain the essence of vedas. The sivagnana bodham. The ultimate reality is the brahmman alone.
Just by seeing the young guru, the sages were satisfied that Shiva (Paramatma) is the essence of vedas.