You should make the right endeavour to know yourself. You can know yourself by developing inner vision rather than outward vision. All sensory activities like sound, smell, touch and taste are only external activities. We delude ourselves into thinking that these activities are real and ruin ourselves ultimately. It is by harnessing the mind that we will be able to realise the Divinity within.
Mind Is the cause for man's life, sorrow, joy and liberation as well.
The very meaning of the word 'Jagat' signifies the transient nature of the world, for 'Ja' means going, and 'Gat' means coming. While the world changes, man remains changeless. It is the self in man which is imperishable, for man is the Self. Man can know himself when he understands the nature of these four types of mind. One has to realise that the Divine power which pulsates in him is the same as the one that pulsates in others.