You just think, a human being without mind. Mind is the main cause for our sorrow and happiness ( “Mana Eva Karananam Manushyanam Bandha mokshayo” ). Yoga is beyond sorrow and happiness. To attain this state we should know the nature and levels of mind. Psychologists classify the mind in four parts 1)Beta 2)Alfa 3)Theta 4)Delta. We feel sorrow and happiness in Beta level when we go to Alfa. We are nearer to Sat-chit-Ananda. It is wonderful sadhana. Come and enjoy it.