Since all art is concrete,there is always a mechanical problem,the problem of technique,which has to be mastered,but as art is also spirit,the vital element in all forms of creation is the personal expression.

• 一切的艺术都是具体的，所以艺术家始终须把握住一个机械上的问题，就是技巧的问题；可是艺术也是精神的，所以个人的表现是一切创造形式的根本要素。