Often when I draw I use both of my hands. Normally I am right-handed. When I draw with my left hand it is a kind of conversation with myself exploring the positive and the negative, the ego and the alter ego, the order and disorder and mounting it on paper. It is as if one hand there is Alighiero and the other, Boetti.
Alighiero e Boetti
UPDATE: here’s the TEDxFlanders talk in which Bart mentioned the quote: