Role of Guru
Be it yog sadhna or tantra sadhna the Guru is considered Supreme; his glory is anant (unending), akhand (expansive). Guru is the ultimate, for it is said that no shaastra, no tapasaya, no mantra, no form or appearance, no God or japa is superior to the Guru. By doing the sadhna of the Guru alone can one become siddha in all the other modes of sadhna. As the path of yog is one of experience and not of the intellect, it requires a force - a guiding light to take you through those experiences.