The importance of this state is explained by Lord Brahman a long time before. Also by Sakra who is known for his wisdom and who has reached the four stages.
He who knows Paramatman as of this radiant consciousness attains immortality immediately. For the attainment of liberation, there is no other way by means of Yajna or Yajna worship of Gods. This is the foremost of all Dharmas (righteous activities). He who knows Brahman attains the heaven wherein the Gods dwell from the times of yore.
Om Tat Sat!