In 1938, he went to hear Herbert Sutcliffe, the proponent of a life philosophy called "Radiant Living", with his family. The family all became foundation members, and his mother became its secretary in 1939. He went to Gisborne as Sutcliff's assistant, and in 1941 sat examinations to become a teacher of Radiant Living, getting a 100% pass mark. His test lecture was on "Inferiority – cause and cure". He said of his five-year association with the movement that "I learned to speak confidently from the platform; to think more freely on important topics; to mix more readily with a wide variety of people". Tenets included healthy eating (the salads that June took to university for lunch) and pacificism. He joined the Radiant Living Tramping Club, and further developed his love of the outdoors in the Waitākere Ranges.