Susmana nadi

When the air flowing in both nostril ,susmana nadi awakning and element of Akash (sky) is flowing :this particular time is for retention of your body with Universal power: any type of work is prohibited and meditation is recommended : Meditation gives best result and in this particular period success would be received in search of universal power: this is the only nadi that gives all types of siddhi but its period is very short as Akash element flows four minutes: yogis tries to expand this period through asana pranayama and making bandh though yogic activities : To know what is not known is the element of Akash and susmana nadi . When longer period avails a yogi he gets various type of siddhi : like rising from earth and swimming in air and so on. This subject become secret in Indian texts but inspite  of that way of yoga always remained interesting for mind and for getting superpower