। ॥ १४९ ॥
In plain words
Follow the inner sound without a break, and supreme bliss is experienced, and goes on being experienced for a long, long while. Of the many ways there are to dissolve the mind, this dissolution is the finest.
Close to the Sanskrit
Because of the experience of supreme bliss for a very long time, from continuous attention to the inner sound — this dissolution of the mind is the best among the many other dissolutions that exist.