Yogasutra Vibhutipada sutra 39-49
Sri Sadgurubhyoh Namah
39. Bandha karana shaithilyat prachara samvedanat cha chittasya para sharira avesha
By loosening the bondage of one's own body, and understanding how mind works, a yogi can enter into another's body. This is used by masters to rectify a student's meditation practices.
40. Udana jayat jala panka kantaka adisu asanga utkranti cha
Mastering Udana vayu (Prana that operates in throat helping to exhale), Yogi masters jala tatva (water principle in the body), and attains 'no contact' with water, mud and thorns and yogi attains levitating power.
I do not think it is the levitation of gross body, but levitation of pranic body.
41. Samana jayat jvalanam
Mastering samana vayu (prana at naval region , helping digestion of (food, thoughts) will help a yogi to attain mastery over agni tatva (fire element) and increases yogi's radiance (aura).
It will be appropriate to mention that the Devata (god) associated with naval region is Surya (sun god).
42. Shrotra akashayoh sambandha samyamat divyam shrotram
By understanding the relation between sound and space, and by doing samyama (concentration, meditation, samadhi) on that relation, yogi attains divine ear.
Sounds (naama, name) are arranged in space and time, and we make some meaning out of it.
43. kaya akashayoh sambandha samyamat laghu tula samatatti cha
By understanding the relation between body and space, one attains lightness to pass through space.
Form (roopa, body) is arranged in space. meditating on lightness of cotton, one attains similar lightness to pass through space. This sutra is related to earth element (muladhara chakra).
44. bahih akalpita vrittih mahavideha tatah prakasha avarana kshaya
When yogi doesnt project his own imaginations onto the world, but only the projections of formless thought patterns, it is called maha-videha. Then the veil over the wisdom is lifted.
45. sthula svarupa sukshma anvaya arthavattva samyamad bhuta jayah
When the relation between sthula (gross) body with sukshma (subtle) body is understood, by knowing how the gross body is formed out of five elements, mastery over the five elements ensues.
46. tatah animaadi pradurbhavah kaya sampad tad dharma anabhigatacha
When mastery of five elements happens, yogi can get powers over gross body like anima (atomic size) etc and understanding of characteristics of five elements happens.
47. rupa lavanya bala vajra samhanana kaya sampat
Kaya-sampad (abilities of gross body) include beauty, gracefulness, strength and hardness
48. grahana svarupa asmita anvaya arthavattva samyamad indriya jayah
By understanding of sense-inputs, how they are percieved by indriyas (sense organs), how they are percieved by mind and finally by asmita (I-ness), yogi masters over sense organs.
49. tatah manojavitvam vira rana bhavah pradhaua jayah
mastery over sensory organs, yogi's mind becomes sharp, and yogi can understand how manifestation happens out of primal cause.
Hari Om
In Guruseva