Thank you, David, for taking the time to respond. I have followed an interesting trail to get to the "source" of this quote. By that, I mean the website from which the person who wrote the article I found it in used as a source.
So far, neither of these authors has responded, so I put this quote into google and it is used in a surprising number of instances.
It is interesting that I am
not the first person to wonder where, exactly, this quote is found in the BhG, or possibly more correctly, which verse inspires this loose translation, if we can even call it that. Perhaps, paraphrasing is more accurate? I personally find the ways knowledge from texts is reconstituted and retransmitted around yogaland to be fascinating.