"The confining form liberates the content."

The confining form actually liberates the content.  This is a universal principle in the human arts.  The confining form of a haiku liberates and expresses satori or kensho. Within the Apollonian confines of the sacred dance, Dionysian energies can safely be released.  Only because the children play inside the playground fence can they play wildly, safe from running into cars or over cliffs. (The Commandments are God's fence to protect our play.)

- Peter Kreeft, Summa Philosphica, pp. 6