Kata ga aru kara katayaburi, kata ga nakereba katanashi. Because there is a form, there can be form-breaking. Without a form, there is only formlessness. The saying plays on two words. Katayaburi, form-breaking, means unconventional. Katanashi, formless, means spoiled or ruined.
The saying is attributed to the kabuki actor Nakamura KanzaburÅ XVIII. Its wording varies. A school newsletter in Sapporo quotes the ending as tada no katanashi, mere formlessness. An original source for either version has not been found.