The Madhyamika sect, which is opposed to the Yoga sect, promotes the concept of emptiness based on the "Middle Way" written by Nagarjuna Bodhisattva. His thinking is that:

The understanding gained from the concepts of secular famous sayings all belong to the scope of drama theory and are called "conventional truths"; all methods that can only be achieved through intuitive observation in accordance with Buddhist principles Reality is called "truth". From the conventional truth, everything is caused by causes and conditions; from the true truth, everything has no self-nature and is ultimately empty. However, conventional existence is ultimately empty, and after all emptiness exists in conventional existence; if you do not follow the conventional truth, you will not have the first meaning; if you do not have the first meaning, you will not have nirvana. That is: in theory, the unity of emptiness and convenience; in terms of understanding and method, the unity of famous sayings and reality, conventional truth and true truth; in practice, the unity of worldly and supramundane, troubles and nirvana, that is, the so-called false existence The view that nature is empty and does not have two sides, existence and non-existence, is called "Middle Way".

It is recommended to read "The Main Ideas of the Buddhist Sects" written by Huang Chanhua. The "Outline of Chapter Three" of "The Main Ideas of the Three Wheel Sects" is very simple and comprehensive. You can read the quotations below. connection.