The mastery is taught to those who are born to be masters, to those who are inclined for this way, by repose and by the control of the activity which keeps every thing in this universe in movement. This mastery is very difficult to gain in the world. At every step it becomes more difficult. But you cannot run away to the caves of mountains. You must stand where you are. If you ran away and lived in the caves of mountains, the attractions of the world would draw you back again. The taste which has been used to different food and nice food would not be satisfied with the leaves and fruits.