The existential force of Life is sorrow. Life is difficult, life is suffering and the inherent force in Manifestation is Sorrow. ( This sorrow is repesented in Astrology by Saturn, the planet of Melancholy, Justice and Retribution ).
This world is Sorrow ( Sarvam Dukham ), everything is transient ( Sarvam Kshanikam ), everything is Void ( Sarvam Shoonyam ), everything is futile ( sarvam vyartham ) and everything is misery ( sarvam duritham ). Knowing this the Guru tells the disciple ” Thou shalt not grieve ” ( na thvam shochithumarhasi ).
The disciple has come to the Master for Wisdom and the Master knows that the mind of the disciple is hurt by the continous web of life and sorrow of the temporal. Hence he tells the disciple ” Thou shalt not grieve”.
It is said that the sorrow given by the Father is removed by the Guru ! It is the function of the Guru to impart Wisdom to the disciple. This will enable the disciple to cross the ocean of worldliness, the real river Vaitharani. A river flowing deathward, macabre, and full of difficulties is this fearsome river, this river Vaitharani, this river which is Life problematic !