| 後設構造之淨化，即使後設收斂為無後設，則當然至空集合。 | The purification of metastructure is to make the meta converge to the meta of void, then of course, to the empty set. |
| 惟空集合之確立，須蒐集一切共性，而排除一切共性，乃需二後設層。 | However, to construct the empty set, we must collect all common properties, and then exclude all the common properties, so we need two metalayers. |
