‘Ha’ means sun representing pingala or surya Nadi which  passes through the right side of the spinal cord and  ‘Tha’ means moon representing eda or Chandra Nadi which passes through the left side of the body.

Our activities are related to the sun and our thoughts are related to the moon Regular practice of ‘hatha yoga sadhana’ will achieve us mastering our thoughts and actions thus leading  to the transformation of our body and mind “If we are having a flexible body and relaxed  mind we can contribute more towards the current contribution in the world ” Hatha yoga practice is Essential for ‘Raja yoga’ and regular practice will lead towards Raja yoga or Asamprajnata Samadhi