A yoga teacher must be a brahmand or universe of knowledge and wisdom, especially as regards yoga and its four main branches: karma yoga, raja yoga, bhakti yoga and jnana yoga with subsects such as hatha yoga. Knowledge of karma yoga helps him become objective and dispassionate, believing in helping others without expectations of reward. Raja yoga is the science of physical and mental well being encompassing yama, niyamas, asanas, pranayama and dhyana. In order to become a yoga guru, you must first undergo yoga teacher training from a guru.
