Here is an excerpt from Dr Tae Yun Kim‘s book, The Silent Master:
That which can’t be destroyed is real. That which can be destroyed is unreal. For example, I can think of the idea “beauty” quite easily. I can think of beauty whether I’m here or in space because beauty exists everywhere. Also, when I die, beauty will still be in the world. No one can destroy it. Beauty is eternal and can’t be destroyed because it exists as an idea in consciousness. That is the nature of any idea in consciousness: it is eternal.