It is a kind of mystery that for people who have no experience of enlightenment, enlightenment is something wonderful. But if they attain it, it is nothing. But yet it is not nothing. Do you understand? For a mother with children, having children is nothing special. That is zazen. So, if you continue this practice, more and more you will acquire something—nothing special, but nevertheless something. You may say “universal nature” or “Buddha nature” or “enlightenment.” You may call it by many names, but for the person who has it, it is nothing, and it is something.
From Zen Mind, Beginner’s Mind by Shunryu Suzuki, page 33