One of the most fascinating of all the biographies of the Gaudiya saints
Sri Nityananda Das Babaji
Amongst all the siddha mahatmas of Vrndavana the personality of siddha Nityananda Das Babaji, disciple of siddha Krsna Das Babaji of Govardhan, was unique. His lila smarana, whether in the state of jagaran (awake), svapna (dreaming), or susupti (deep sleep), was continuous like a stream. In his waking state it appeared as if he were asleep, because in waking he controlled his bhava and remained mostlty grave, motionless and samadhistha ( absorbed in deep meditation). When made to get up for essential activities like bathing and eating, he got up like one who is in deep sleep. But in actual sleep, while experiencing lila he laughed, wept or talked as if he were awake; because in sleep it was not possible for him to control the bhava. Therfore, it was not possible to determine whether at any particular time he was asleep or awake.
Under the circumstances he was not readily available for conversation. Nevertheless, people who came to him to ask questions and get their doubts resolved and difficulties removed, did not return disappointed. Their doubts were resolved and difficulties removed merely by sitting in his presence.