White spaces are an integral component of a painting, in the same way as the appreciation of a work of calligraphy requires an understanding of the blank spaces within the characters as well as the lines of the characters themselves, because blank spaces are an important factor in achieving an esthetic balance in a calligraphic work.
所以，留白是畫面空間的一部分，正如我們欣賞書法作品，除了欣賞筆畫線條本身，更應該瞭解其字裡行間的空白處，因為這也是造就書法美的主要因素。