What is Adjuvari Quippe Nos, Non Decipi, Beneficio Oportet?

Legal Definition
We ought to be favored, not Injured, by that which is intended for our benefit. (The species of bailment called "loan" must be to the advantage of the borrower, not to his detriment.) Story, Bailm. § 275. See 8 El. & BL 1051.
-- Black's Law Dictionary
Legal Definition
We should be aided and not injured by that which is intended for our benefit.
-- Ballentine's Law Dictionary