Though Fushikaden discusses flowers at length, Kakyo deals with spiritual beauty and contains discourses on the voice of the actor and the actors' minds.[17] A possible interest in Zen has been credited with this shift by some scholars.[2] The change in his age between his first and last works also appears to have significantly affected his perspective.[3] He spent a significant amount of time writing Kakyo and gave the completed work to his son Motomasa,[34] Zeami's son Motoyoshi had previously transcribed Zeami's treatise Reflections on Art.[5]