I want to know what an empty door means, thank you.

"Emptiness" is one of the most common and professional terms in Buddhism, because Buddhism in the modern sense is an educational discipline that reveals the laws of natural life in the universe, emphasizing the relationship between matter and spirit, especially the internal and external aspects of spirit. For everything in the world, shape and color are called "colors", and all of them are made up of exactly the same atoms. This essence is called "emptiness". Therefore, "door" represents an academic school or sect, and Buddhism is also called "empty door" by the world.

Epiphany is an empty door, which means that a person suddenly realizes the relationships and laws between everything in the world and life, and knows that he will live according to these relationships and laws in the future. Such people either become scholars or monks. An empty door epiphany often means that this person wants to understand these truths said by Buddha and prepare for becoming a monk.