From the perspective of the concept of gaining knowledge by observation, as advocated by the Song dynasty School of Laws in Chinese philosophy, if you observe a flower you will see that the petals are red and the leaves are green, but if you keep on watching it from when the buds burst to when the leaves wither, you will see that it is changing all the time.
從宋代理學格物致知的觀念來看，你觀察一朵花，看到的是花紅葉綠。可是如果你一直看，從含苞到枯萎，它是一直在變化的。