• As I grew up, everything started getting grey and dull. I could still remember the amazing intensity of the world I'd lived in as a child, but I thought the dulling of perception was an inevitable consequence of age - just as a lens of the eye is bound gradually to dim. I didn't understand that clarity is in the mind.

    Keith Johnstone (1981). “Impro: Improvisation and the Theatre”, p.13, Routledge