 There are two aspects to Guo’s understanding of wuwei. First, as things and affairs are informed by principles, there is a natural way of action and interaction. Like the fabulous Cook Ding (Zhuangzi 3) who could cut up an ox without having to rely on sensory perception or mental calculation, and just as spontaneous affection characterizes the parent-child relation, the sage accomplishes all tasks by simply following the “grain” or nature of phenomena.