US-P18.066ab ।US-P18.066cd ॥
In plain words
Knowing is what the Self is — an eternal light; śruti says so. So it is never manufactured: not by the intellect, not by the Self, not by anything else, ever.
Close to the Sanskrit
And since, on the authority of śruti, knowledge — eternal light — is the very nature of the Self, therefore it is never made: not by the intellect, not by the Self, nor by anything else.