The Shin Jin Mei (Chinese 信心銘 - Xin Xin Ming or Hsin Hsin Ming), Faith in mind, is a poem attributed to the Third Chinese Chan (Zen) Patriarch Kanchi Sozan (Chinese Jianzhi Sengcan or Chien-chih Seng-ts'an)
One of the earliest Zen document we have, it is a beautiful and syncretic text, in which Indian Mahayana Buddhism is already deeply influenced by Chinese Taoism.
Multiple translations are available, but one of its stanza has been rendered as :
The Way is perfect like Vast Space, with nothing lacking, and nothing in Excess.
Here is a video of Masayaki Shimabukuro Hanshi, which I believe perfectly illustrate Nothing Lacking, Nothing in Excess...
Enjoy, Be inspired, Practice...
