The Buddha’s primary goal of teaching was to communicate precisely the doctrine of the Three Dharma Seals to the listeners. Failing this, the teaching would have been pointless. What made the Three Dharma Seals so important?  The answer is in the sutras. A disciple once asked the Buddha, “How can the real teachings be distinguished if the non-Buddhists try to deceive with their false version after you, The Blessed One, pass into nirvana?” The Buddha answered, “Any teaching, as long as it espouses the principles of the Three Dharma Seals, can be considered Buddhist teaching; otherwise, it is not Buddhist teaching.” The fact that the Buddha always emphasized the key points in his transmissions should explain why so much importance has been attached to the Three Dharma Seals.

- Quote from The Right View, "Buddhism—the Definition"

Renunciation and bodhicitta should be practiced separately in proper order and followed by the practice of emptiness. As such, renunciation and bodhicitta that were practiced beforehand will also turn into the wisdom of emptiness.

Here, emptiness is not like the Theravada view of no-self. Rather, it contains the element of great compassion. And within great compassion, there is realization of emptiness. These views and practices of the union of wisdom and compassion encompass all the implicit significance of the Dharma. However, they are much easily said than done.

- Quote from The Right View, "Buddhism—the Definition"

The idea of great compassion, as elucidated by the Buddha, does not exist in any of the worldly schools of thought. The traditional Chinese culture upholds moral principles and the Western culture advocates charity and social welfare.   But the Buddha’s idea of altruism, demonstrated by the meditation practice of tonglen, for example, and the bodhisattva’s commitment to unconditional dedication to others, are unparalleled.

- Quote from The Right View, "Buddhism—the Definition"

Buddhism holds that a glass of water seen by sentient beings of the six realms will manifest six different phenomena, respectively. By the same token, beings of the six realms will see six different worlds, somewhat like the idea of the multiverse.

- Quote from The Right View, "Buddhism—the Definition"

Renunciation is the foundation of bodhicitta. Having aroused bodhicitta, one is qualified to receive the bodhisattva vows which one can bestow on oneself. Afterwards, one can begin the practice on emptiness. Knowing that the union of wisdom and compassion is the combination of emptiness and bodhicitta essentially means that one has understood perfectly the quintessence of all the exoteric and esoteric teachings of Mahayana Buddhism.

- Quote from The Right View, "Buddhism—the Definition"

Rongzom Pandita, one of the greatest scholars of the Nyingma lineage, once said, “The invariable definition of Buddhism is wisdom and compassion. No other explanation can fully express the core of Buddhism.”

- Quote from The Right View, "Buddhism—the Definition"

Renunciation depends on the practice of the four general preliminaries, that is, the conviction of the rarity and preciousness of human birth and impermanence of all phenomena must be generated. For bodhicitta to be aroused, there must be sufficient amount of merit accumulated through mandala offering and obscurations purified and healed by meditation on Vajrasattva. Clearly, one cannot avoid undertaking the practice of general and extraordinary preliminaries no matter how one chooses to go on the path. This is also the reason why I have been insisting all along on the necessity of preliminary practice.

- Quote from The Right View, "Buddhism—the Definition"

The Buddha himself once said that there were quite a few inconsistencies in his teachings in order to suit the taste of different audience, but the one that would never change is the teaching on emptiness.  For example, from the point of view of relative truth, impermanence and suffering being the nature of all phenomena are deemed absolute truth, but not from the point of view of the ultimate truth. In the Three Dharma Seals, only no-self is deemed the absolute truth.

- Quote from The Right View, "Buddhism—the Definition"

In the view of Mahayana, the Nirmanakaya (Emanation Body) and the Sambhogakaya (Bliss Body) are the manifestations of the Buddha in order to liberate ordinary people and bodhisattvas of the first to the tenth bhumi, respectively.   The Nirmanakaya is for the Buddha to communicate with ordinary people. Although Buddha-nature exists within the mind of every sentient being, the Dharmakaya (Truth Body) of the Buddha is rendered powerless to those who have not attained realization and thus must rely on the Nirmanakaya and the Sambhogakaya of the Buddha for guidance to enlightenment. However, neither the Nirmanakaya nor the Sambhogakaya is the true Buddha, only the Dharmakaya, the union of wisdom and compassion, is.

- Quote from The Right View, "Buddhism—the Definition"