Brahmacharya Vigyan

Bramcharya is broad sense it means control of the senses or indriyas. More specifically it refers to celibacy or chastity.
The conservation of energy that comes from practicing celibacy is converted into Ojas and Tejas (spiritual energy). Eventually yogic powers can also manifest by the perfect practice of brahmacharya.
There are many famous yogis and spiritual leaders who were established in this yama.

Brachmacharya is considered one of the cornerstones of a serious yoga practice.