What is natural does not have to be a representation of something. I'm now working on a thing that is a reconstruction of a starry sky, and yet I'm making it without a given from nature. Someone who says he uses a theme from nature can be right, but also someone who says he uses nothing at all.
Piet MondrianThe essence of painting has actually always been to make it [the universal] plastically perceptible through colour and line.
Piet MondrianColored planes, by their position and size as well as by their value, express only relationships, not forms.
Piet MondrianRecognizing and uniting with the universal therefore gives us the greatest aesthetic satisfaction, the greatest emotion of beauty. The more determinately (consciously) this recognition is experienced, the more intense our happiness. The more determinately (consciously) this union with the universal is felt, the more individual subjectivity declines.
Piet Mondrian