There is no must in art because art is free.
The artist must be blind to distinction between 'recognized' or 'unrecognized' conventions of form, deaf to the transitory teaching and demands of his particular age.
The artist must train not only his eye but also his soul, so that it can weigh colours in its own scale and thus become a determinant in artistic creation.
I value those artists who embody the expression of their life.
In general, therefore, color is a means of exerting a direct influence upon the soul. Color is the keyboard. The eye is the hammer. The soul is the piano with its many strings. The artist is the hand that purposefully sets the soul vibrating by means of this or that key.
The artist is not a 'Sunday child' for whom everything immediately succeeds. He does not have the right to live without duty. The task that is assigned to him is painful, it is a heavy cross for him to bear.
The artist is the hand that, by touching this or that key, sets the soul vibrating automatically.
I really believe that I am the first and only artist to throw not just the 'subject' out of my paintings, but every 'object' as well.