The latter taps into a nation's expressive power.

后者利用了一个民族的表现力。

And later realized the chance arrangement of forms on the floor had more expressive power than what he had been trying to achieve through deliberation.

后来意识到，地板上形状的偶然排列比他一直试图通过深思熟虑实现的效果更具表现力。