So the Buddha didn't tell the world this most correct method at the beginning, because there was no Buddhism in the world at that time. Starting with Agama, it is getting deeper and deeper, then talking about Mahayana classics, and finally talking about the real teaching classics-the Lotus Sutra of Mifa, which was said in the last nirvana of Fahua. Nirvana Sutra is a summary and settlement. The principle of "one Buddha's multiplication" and "Tathagata's hidden wonders" are embodied in Shurangama Sutra and Fire Eye Golden Eye, as well as in Heart Sutra and Amitabha Sutra. Therefore, Tommy Jing is called "the secret marrow of Fahua". From the perspective of Buddhism, you are right to say that the legal significance of Tathagata is the highest and final.
Why is Tathagata Tibetan jurisprudence the lowest and most basic? Why is it that "there are many people who practice Buddhism, but few people who get the Tao"? The Huayan Sutra of Dafang Guangfo Buddha says that "it is a famous magic industry to forget bodhicitta and practice all kinds of good dharma". Whether bodhicitta is bodhicitta or convenient bodhicitta, it is a magic industry. I don't understand, practicing all kinds of good dharma is a magic industry. The Shurangama Sutra says: "All sentient beings leave this original knowledge, but they are unconscious and waste their interests." "Original knowledge" is Buddhist, that is, wonderful and sincere. Even if we practice hard all day, we will still enter the six divisions in the wheel of karma in vain. It is said in the Six Ancestors Tanjing that "it is useless to learn Buddhism if you don't know your true heart", and the true heart is still our wonderful and sincere heart, that is, Tathagata hides. Knowing that the Tathagata is hiding means knowing the nature, and we will get rid of the cycle of life and death, and we will not "waste interest", practice dharma, or blindly practice dharma. Leng Ci Buddhism requires us to be clear-headed and natural. Knowing that the Tathagata learned after enlightenment, he would not go astray, but would gradually improve and perfect. Therefore, understanding Tathagata is the lowest and most basic.