There is no must in art because art is free.

Color is the keyboard. The eye is the hammer. The soul is the piano, with its many strings.

The more abstract is form, the more clear and direct its appeal.

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.

It is essential that the painter should develop not only his eyes, but also his soul, so that it too may be capable of weighing colors in balance.

Color is the keyboard, the eyes are the harmonies, the soul is the piano with many strings. The artist is the hand that plays, touching one key or another, to cause vibrations in the soul.

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.