When the Buddha stayed in the Saha World, he advocated vegetarianism, but he did not force people to eat vegetarian food. Why? Because some people like delicious food very much, and if they insist on being vegetarian, they will not dare to become a monk. So, at that time, the Buddha had some greedy disciples who liked to eat meat, but he didn't say anything. Monks beg for food in accordance with the order and direction. People who are not greedy will say, "I will eat whatever others offer me." People who are greedy want to have choices.
What is the difference between eating meat and not eating meat? Meat eaters have many desires and delusions, and it is difficult for them to achieve Samadhi. If you don't eat meat, you will have less desires and be satisfied, and you won't have so many delusions, because the Qi and blood are pure and not turbid. Meat contains a kind of turbid Qi, because it is produced from a very filthy thing, so when people eat it, it is not easy to observe the precepts, not easy to develop wisdom, not easy to attain samadhi, he wants to observe the precepts but has many delusional thoughts. He always fails to abide by the rules, cannot obtain samādhi-bala (Strength of concentration), and feels uneasy when walking, standing, sitting or lying down.
Since samadhi cannot be attained, there is no real wisdom; With true wisdom, no problems will occur. Eating meat is going down the road of ignorance. If you don't eat meat, you will be on the road to wisdom. The difference is here.
Whoever wants to be truly wise should be content with less desires, don't eat so much meat, and combine your own meat with pig meat to form a limited company. It would be weird if you don't turn into a pig in the future! Eat so much beef, and merge into one limited company with cattle, since the cause from cattle and karma from cattle exist in it, it is very possible to become a cow in the future. And even if you eat dog meat, you will become a dog, and if you eat rat meat, you will become a rat. Whatever meat you eat, your body will survive due to the causes and conditions of that meat. Over time, you will become that kind of thing. Just because the Qi in your body has turned into pig Qi or cow Qi, the blood has turned into that blood, the Qi has turned into that Qi, so the meat has also turned into that kind of meat. Wise people should think deeply about it!