This year [Paris 1916-17, when Mondrian didn't finish hardly any painting] I have worked hard, and done much searching. A great deal of the old [way … - Piet Mondrian

I believe that it is possible by means of horizontal and vertical lines, constructed 'consciously' but not 'calculating', guided by a higher intuition and brought to harmony and rhythm – I believe that these fundamental aesthetic shapes – where necessary supplemented by lines in other directions or curved lines, make it possible to arrive at a work of art which is as strong as it is true. For anyone who sees more deeply, there is nothing vague about this; it is only vague for the superficial observer of nature. And 'chance' must be as far removed as 'calculation'. And for the rest it seems to me that it is necessary to keep breaking off the horizontal or vertical line: for if these directions were not countered by others, they would themselves come to signify something 'specific' and thus human.

[jazz and Neo-Plasticism are] highly revolutionary phenomena: they are destructive constructive. They do not destroy the actual content of form, but rather deepen form only in order to elevate it to a new order. They break the bonds of 'form as individuality' in order to make possible a universal unity.

Instinct reveals itself as self-concentrating, self-edifying it is limitation. Intuition produces self-denial, self-destruction； it is expansion. Culture can develop both. If it develops instinct, animal nature appears. Then culture destroys the intuitive capacity which men have even found in a primitive state.