Since time immemorial, the science of Yoga has always been transferred from the lips of the Guru to the spiritual aspirant or disciple
The Guru illumines the spiritual path by casting his internal light towards the aspirant, so that he can begin to see with the inner eye. This is due to the awakening of spiritual energy. Spiritual knowledge is a matter of Guru-Parampara. It is transmitted from Guru to disciple. The role of Guru is the highest importance, as is the sincerity, humility, and loyalty of the student. His grace enables the disciple to perceive the latent spiritual power within, and shows the doorway to the Super-Consciousness. But it is the disciple who must step throughout it.