Form is the outer expression of the inner content. Therefore one should not make a deity of form. And one should fight for the form only insofar as it can serve as a means of expression of the inner resonance. Therefore one should not seek salvation in one form...

The fearful clinging to one form leads finally and inevitably into a dead end. The open feeling leads toward freedom. The former is to restrict oneself to the material substance. The latter is to follow the spirit: the spirit creates one form and goes on to others.

- Wassily Kandinsky