You exist as an idea in your mind...

“The true purpose [of Zen] is to see things as they are, to observe things as they are, and to let everything go as it goes... Emotionally we have many problems, but these problems are not actual problems; they are something created by our self-centered ideas or views. When we realize the everlasting truth of “everything changes” and find our composure in it, we find ourselves in Nirvana.” ―Shunryu Suzuki