摩訶止觀 6.191

6.191

答：如為不識氷人指水是氷，指氷是水，但有名字，寧復有二物相即耶？如一珠向月生水，向日生火，不向則無水、火。一物未曾二，而有水、火之殊耳。

Answer: Just as for a person who does not recognize ice, one points to water as ice and points to ice as water, there are only names; how could there be two things that are mutually identical? Just as a single jewel facing the moon produces water, and facing the sun produces fire, yet without facing them produces neither water nor fire: a single thing was never two, yet there is the distinction between water and fire.