15. But the order of succession...
15. But the order of succession (which is stated) in reverse order (of the true one) is possible, (only
if the origination of all effects is) thence (i.e. from Brahman).
The 'but' has an asseverative sense. The direct origination from Brahman of all effects--which in passages such as the one quoted by the Pûrvapakshin is stated in a form the reverse of the (true) order of origination according to which the Unevolved, the Mahat, the ahankâra, Ether, and so on, succeed each other--is possible only on the supposition of the origination of each effect being really from Brahman itself in the form of a special causal substance. To understand the causality of Brahman as a merely mediate one would be to contradict all those statements of immediate origination. Texts such as the one quoted thus confirm the conclusion that everything originates from Brahman directly.