"the siddhis are essential to achieving samadhi, which is the true power ... to deny them [the siddhis] is to deny your ultimate freedom. You can only step beyond these powers once you've acquired them. Renouncing them beforehand, as many practitioners of yoga do, mimics yet forestalls the true liberation... In addition, renouncing the siddhis, as some yoga teachers today advocate, keeps you powerless, and perpetuates your suffering as a victim." --Yoga, Power, and Spirit: Patanjali the Shaman, Alberto Villodo, Ph.D