Nature seems to take advantage of the simple mathematical representations of the symmetry laws. When one pauses to consider the elegance and the beautiful perfection of the mathematical reasoning involved and contrast it with the complex and far-reaching physical consequences, a deep sense of respect for the power of the symmetry laws never fails to develop.

Selected Papers of Chen Ning Yang II: With Commentaries (ed. World Scientific, 2013) - ISBN: 9789814449038