[Paris, as modern city] is beautiful in its perfection, but perfection means death and decay. Thus interfering with the process of dying is a crime a… - Piet Mondrian

It took me a long time to discover that particularities of form and natural colour evoke subjective states of feeling which obscure pure reality. The appearance of natural forms changes, but reality remains. To create pure reality plasticity, it is necessary to reduce natural forms to constant elements of form, and natural colour to primary colour. The aim is not to create other particular forms and colours, with all their limitations, but to work toward abolishing them in the interest of a larger unity.

Kandinsky points out [in his book On the Spiritual in Art] that Theosophy (in its true sense; not as it generally appears) is yet another expression of the same spiritual movement which we are now seeing in painting.

Gradually I became aware [c. 1914-1918] that Cubism did not accept the logical consequences of its own discoveries; it was not developing abstraction towards its ultimate goal: the expression of pure reality.