Rudolf Arnheim in his book "Art and Visual perception" says
" any visual object , be it Greek, minimal or otherwise , remains fatally incomplete if it limits itself to pointing out that everything fits nicely together. The analysis of balance and unity though indispensable, avoids the question without which any visual statement remains incomprehensible: What is it that is being balanced ?
This question can not be answered by reference to subject matter alone. It refers first of all to the form we see..."