'The second and more complicated form of repetition is that in which several different elements make mutual use of different forms. In our case these elements are the different arts summed up in he art of the future. And this form of repetition is even more powerful, for the different natures of men respond to the different elements in the combination. For one, the musical form is the most moving and impressive; for another the pictorial, for the third the literary, and so on. There reside, therefore, in arts which are outwardly different, hidden forces equally different, so that they may all work in one man towards a single result, even though each art may be working in isolation.

This sharply defined working of individual colours is the basis on which the various values can be built up in harmony. Pictures will come to be painted- veritable artistic arrangements, planned in shades of one colour chosen according to artistic feeling. The carrying out of one colour, the binding together and admixture of two related colours, are the foundations of most coloured harmonies. From what has been said above about colour working, from the fact that we live in a time of questioning, experiment and contradiction, we can draw the easy conclusion that for the harmonisation on the basis of individual colours our age is especially unsuitable. Perhaps with envy and with a mournful sympathy we listen to the music of Mozart, it acts as a welcome pause in the turmoil of our inner life, as a consolation and as a hope, but we hear it as the echo of something from another age long past and fundamentally strange to us. The strife of colours, the sense of balance we have lost, tottering principles, unexpected assaults, great questions, apparently useless striving, storm and tempest, broken chains, antitheses and contradictions, these make up our harmony.'

- The language of form and colour from Concerning the spiritual in art by Wassily Kandinsky