The Buddha clearly told us that meat eaters would become carnivores such as lion, tiger, and leopard if they were to descend to the animal realm. This can be inferred through logic as well. In the animal realm, there are only two categories of food: meat or non-meat (vegetables, fruits and nuts). At that point, because of the deeply ingrained tendency to eat meat (habitual tendencies can wield great power), meat eaters will become carnivores who can only kill to survive. It is stated in the Abhidharma-kosha-shastra that there are three types of killing—killing born of greed, ignorance and anger. To kill for food is one born of greed.

[Excerpt from Luminous Wisdom Book Series 1: The Right View ~Why Vegetarian?]

It is stated in the scriptures that if our motivation is found to be neutral, we should rather improve than eliminate it. The reason is that the quality of being “neutral” and “wholesome” are relatively closer to each other, whereas being “wholesome” and “unwholesome” are poles apart. So while the former can be improved, the latter must be given up. Ordinarily, before we sit down to practice or meditate, we should first examine the motivation carefully. If it was found to be neutral, we should improve it. Otherwise, none of what we do can lead us to enlightenment. The resulting virtuous karma caused by a neutral motivation may be able to bring some temporal rewards, but only very meager ones.

[Depicted from "The Right View ~ The Three Supreme Methods"]

Close attention is needed when administering nectar pills. As ordinary beings, we cannot tell the real from the fake ones with the naked eye. The only way is by examining whether the pills came from a pure source. This is a very important step. If we are unsure of their source, we should just chant the Buddha’s names and omit giving the nectar pills to the soon-to-be liberated beings.

[Excerpt from Luminous Wisdom Book Series 1: The Right View ~ Liberating Living Beings]

The Lankavatara Sutra: If meat-eaters should be reborn in the animal realm, they would be carnivores for sure. It is because their predilection for meat in this life has left a strong habitual tendency of craving for meat in their alaya consciousness. When they take rebirth, the body may have changed, but the habitual tendencies still remain in the alaya consciousness. We can see that when this tendency is in force, some carnivores, just a few hours after being born, would hunt other small animals for food without ever being taught how to. Because they were meat-eaters in the past, the tendency to eat meat is very strong. Coupled with the fact that being animals now makes them unable to choose right from wrong, they cannot help killing for food again this time around. This is the most terrifying aspect.

[Excerpt from Luminous Wisdom Book Series 1: The Right View ~Why Vegetarian?]

An analogy used by Maitreya Bodhisattva in the Uttaratantra Shastra aptly defines the Four Noble Truths. When treating any illness, doctors need to take four steps: 1) to ascertain the nature of the illness; 2) to eliminate the cause of the illness, since it would be ineffective to treat only the symptoms; 3) to prescribe remedies; 4) to heal. All doctors must go through this four-step process to treat an illness. Not knowing the cause of the illness, the doctor cannot prescribe a cure. Even knowing the cause of the illness but having no suitable medicine or the requisite pharmacological knowledge, or worse, giving the wrong prescription, the doctor will still be rendered ineffective. Nevertheless, everything that is concerned with treating a patient starts with identifying the cause of the illness. The Four Noble Truths also correspond to the four steps of treating an illness. The nature of suffering is what to be ascertained, the origin of suffering to be eliminated; the path leading to the cessation of suffering is what to be practiced (prescription), the cessation of suffering to be attained (cure).

[Depicted from The Right View - The Four Noble Truths"]

According to the Hinayana tradition, one is allowed to eat only the ‘three kinds of clean flesh.’ Other kinds of meat are strictly forbidden. Now in Thailand and other Southeast Asian countries, the Sangha still upholds this practice. They think that not eating meat at all is to follow the decree of Devadatta. And the practice of eating the three kinds of clean flesh is rather in keeping with the precepts taught by the Buddha in the Theravadin Vinaya.

[Excerpt from Luminous Wisdom Book Series 1: The Right View ~Why Vegetarian?]

It is also very important to place the texts of ‘wearing liberation’,3 such as the Tantra, Single Heir of the Doctrine, on the head of the beings to bless them. Beings touched by this will soon be able to attain liberation. One may question, “These beings have neither practiced nor received transmissions of the Dharma. Why should they be able to attain liberation simply by attaching the ‘wearing liberation’ to their body or being touched by it?” The only plausible explanation would be the inconceivable power of the Buddha’s skillful means to deliver sentient beings from suffering.

[Excerpt from Luminous Wisdom Book Series 1: The Right View ~ Liberating Living Beings]

The Lankavatara Sutra: when animals see meat-eating people, they may seem a little scared. We know that animals in some ways are much more sensitive than humans. They know who are meat eaters and can differentiate the smell between a meat eater and a vegetarian. The Buddha said that when meat eaters approach animals, especially small animals, they may terrify the animals so much as to make them almost feel faint. It is the same as how a human would feel when seeing a Rakshasa, a demon also called man-eater. Consequently, from the perspective of benefiting sentient beings, those who claim to be bodhisattvas, who have taken the bodhisattva vows and are cultivating compassion definitely should not eat meat either.

[Excerpt from Luminous Wisdom Book Series 1: The Right View ~Why Vegetarian?]

People can never be fully satisfied with their lives if they do not know how to control their desires, as desires can grow and expand endlessly. No matter who you are, there will always be someone who is better than you. If your aim is to get to the top social stratum, your whole life will be spent in the pursuit of such vanity until the end. The consequence of chasing endless desires is never to be happy. Many such cases can be found in our daily life either from our own experience or that of other people. It is therefore important to be content with fewer desires in life.

[Excerpt from Luminous Wisdom Book Series 1: The Right View ~Why Vegetarian?]