The need to realise Brahman according to Mundakopanishad.

To the question-why one must realise Brahman the following explanation is given.

Man's sufferings lasts only until he sees the supreme being, that dwells within himself.

The indwelling supreme spirit and the individual soul are like two birds.They cling to one another and are on the same tree."One eats the fruits of the tree and the other looks on ,happy."

One is attached to karma .The other is free of karma's.

When a man see this detached universal ruler within himself ,the distinction between good and evil drops out.He is freed from desires and passions and becomes one with the universal ruler and finds eternal bliss.