Swami Vivekananda wrote about his experience in the song of Samadhi. He asked Siram Pishna, what do you want after you attain nirvikalpa samadhi? What do you want? He said, I want to be in that state. So this is the greatest gain and there is nothing greater than this to no more,. Nothing more to be attained and established in which even the greatest of sorrows cannot shake you.