 In "Light on Yoga", B. K. S. Iyengar quotes several scriptures, stating that the yogin who contemplates Atman and practises Siddhasana for 12 years obtains the yoga siddhis, supernatural powers; and that once the pose is mastered, samadhi follows "without effort".Siddhasana is one of the oldest asanas, being described as a meditation seat in the 10th century "Goraksha Sataka" 1.10-12.The "Hatha Yoga Pradipika" praises the asana, implying it is the only one that practitioners would need, asking "When siddhasana is mastered, of what use are the various other postures?"