“As for myself, I confess to a preference for clear-cut situations, for radical and even extreme positions. But I also feel a secret and very strong attraction to ambiguous situations… for example, that hovering moment when it is no longer day and not yet night, the shades of emotion between indifference and friendship… (they) are so fascinating because they are so indefinable. That which is pure transition, is all the more appealing to the mind because of its elusiveness. It is the same in the cases of Mondrian, Kandinsky and the Cubists: abstraction and figuration have a common frontier in their work that is so tenuous that we often do not know which side we are on. It is this ambiguity that imports a rare poetic charm to their paintings. Artists like Klee, Miro and Dubuffet have also pitched their tents on this borderline and constantly travel from one side tot the other.”

Source: Abstract Painting (1964), pp. 43/44: (1962)