Yoga Sutras 3.43

Finally, someone has mastered Patanjali’s Sutras!

kaya akashayoh sambandha samyamat laghu tula samatatti cha - Yoga Sutras 3.43

By meditating on the relationship of the body and space, one develops lightness as cotton, and passage through space is attained.

From: http://yowayowacamera.com/