Three Jewels
The outer three jewels are the Buddha, Dharma, and Sangha. The Three jewels have an inner aspect, known as the Three Roots: the Guru (or Teacher), who is the root of blessings; the Yidam, who is the root of accomplishment; and the Dakini, who is the root of enlightened activity. Although the names are different, these three do not in any way differ from the Three Jewels. The Guru is the Budha ["sic"], the Yidam is the Dharma, and the Dakinis and Protectors are the Sangha. And on the innermost level, the Dharmakaya is the Buddha, the Sambhogakaya is the Dharma, and the Nirmanakaya is the Sangha.