Interview with a famous synaesthete from long, long, ago

What language do you think in?

I don't think in any language. I think in images. I don't
believe that people think in languages. They don't move their
lips when they think. It is only a certain type of illiterate
person who moves his lips as he reads or ruminates......

This is an excerpt from:

Nabokov's interview. (02) BBC Television [1962]
http://www.kulichki.com/moshkow/NABOKOW/Inter02.txt