Zhuangzi would not make that point in terms of deduction from a normative premise or principle. The internal and external paths themselves have a causal and normative relation to our walking behavior. A more sentential focus would similarly mean describing the outcome as an action rather than an extended course of  walking/following behavior. A sentence would state the action or the intent—rather like the conclusion of a practical syllogism rather than, as as fits in this metaphorical space, as performing a role in a play or or part in a symphony.