The three cycles of Buddha Shakyamuni’s teachings are known as the three turnings of the wheel of Dharma.
In the first turning of the wheel, at Vārāṇasī, he taught the Four Noble Truths common to both Hīnayāna and Mahāyāna.
In the second, at Rājagṛiha, or Vulture Peak, he expounded the Mahāyāna teachings on absolute truth — the truth devoid of characteristics and beyond all conceptual categories. These teachings are contained in the Prajñāpāramitā Sūtra in One Hundred Thousand Verses.
The third turning of the wheel, at several different times and places, was devoted to the ultimate teachings of the Vajrayāna, or adamantine vehicle.
The Dharma consists of the Dharma of Transmission and the Dharma of Realization.
The Dharma of Transmission is the word of the Buddha as collected in the Tripiṭaka: the Vinaya, the Sūtras, and the Abhidharma.
The Dharma of Realization is the actual realization of the teachings, cultivated through discipline, meditation, and wisdom.

Dilgo Khyentse Rinpoche
from the book The Heart Treasure of the Enlightened Ones
Read a random quote or see all quotes by Dilgo Khyentse Rinpoche.
Further quotes from the book The Heart Treasure of the Enlightened Ones:
- No greater virtue
- The intention to benefit others
- Mastery of the mind
- A lump of earth
- Remember death
- Stillness and movement
- This is very shortsighted
- Two ways to meditate
- Mind filled with faith
- Ordinary worldly goals
- The spear of mindfulness
- Don’t be like that
- The shadow of our actions
- Cause and effect
- Following the view
- Seeing the truth of the teaching
- At the time of death
- The only way to obtain lasting happiness
- The gift of the Dharma