I want to insert a parenthetical phrase into a quotation as an editorial note. Since such notes are surrounded by square brackets to differentiate them from the original quote, I end up with this:
“All reasonings concerning matter of fact [(i.e., all objects of human reason or enquiry other than relations of ideas)] seem to be founded on the relation of Cause and Effect” (Hume 16).
This syntax looks silly, but is it correct?