Being is being perceived, which means being outside the spirit is being perceived.

"Being is being perceived" is regarded as a famous saying of Bishop Bekele. George berkeley (1685~1753) was a British empiricist and talented philosopher. He published several important philosophical works at a very young age, such as New Theory of Vision (179) and Principles of Human Knowledge.

Bekele said that the existence of spirit (or mind, soul or self) is imperceptible, but although it is imperceptible, Bekele said that spirit exists. Therefore, the "existence" in this sentence refers to the existence of everything except spirit, so the complete expression should be that existence is perceived besides spirit.

Because he thinks that things that are perceived by human sensory organs exist, and things that are not perceived do not exist, that is, thinking determines existence, which is subjective idealism. Subjective idealism regards everything in the external world as the manifestation and product of self-subjective spirit.

objective idealism believes that an objective spirit or principle is an ontology that exists before and independent of the material world, while subjective idealism regards a certain subjective spirit of an individual, such as feeling, experience, mind, consciousness, idea and will, as the first in the world.

The origin and foundation of things' production and existence, so "being is being perceived" means that the external world is just your own feelings, and it is subjective idealism to regard feelings as the production foundation of everything.