Chuang Tzu admits that he was a man of many ideas, and that his works would fill five carts--this, it must be remembered, because they were written on slips of wood tied together by a string run through eyelets.

But he adds that Hui Tzu's doctrines are paradoxical, and his terms used ambiguously.

Hui Tzu argued, for instance, that such abstractions as hardness and whiteness were separate existences, of which the mind could only be conscious separately, one at a time.
He declared that there are feathers in a new-laid egg, because they ultimately appear on the chick.

He maintained that fire is not hot; it is the man who feels hot.

That the eye does not see; it is the man who sees.