Proponents of De Stijl sought to ex

Proponents of De Stijl sought to express a new utopian ideal of spiritual harmony and order. They advocated pure abstraction and universality by a reduction to the essentials of form and colour; they simplified visual compositions to the vertical and horizontal directions, and used only primary colors along with black and white. Indeed, according to the Tate Gallery's online article on neoplasticism, Mondrian himself sets forth these delimitations in his essay 'Neo-Plasticism in Pictorial Art'. He writes, "... this new plastic idea will ignore the particulars of appearance, that is to say, natural form and colour. On the contrary, it should find its expression in the abstraction of form and colour, that is to say, in the straight line and the clearly defined primary colour." The Tate article further summarizes that this art allows "only primary colours and non-colours, only squares and rectangles, only straight and horizontal or vertical line."[3] The Guggenheim Museum's online article on De Stijl summarizes these traits in similar terms: "It [De Stijl] was posited on the fundamental principle of the geometry of the straight line, the square, and the rectangle, combined with a strong asymmetricality; the predominant use of pure primary colors with black and white; and the relationship between positive and negative elements in an arrangement of non-objective forms and lines."[4]