I do not know of a passage of Scripture that would verify that view. I did a run through the NT and could not find a passage that would confirm that. Many passages simply mention the work of the Spirit but do not refer to a believer standing by who becomes a kind of "agent" for His convicting work.

   I personally think that such a view is an overstatement. There is no doubt that the Spirit of God uses means such as the Bible, and of course often the witness of a believer. But to say that He never works without a child of God present cannot be confirmed by Scripture.

   Thanks for asking.
   Dr. Mal Couch