QUOTE : 37. 'But more potent forces motivated these subsequent authors as well. Across cultures and eras, the two greatest powers behind the production and dissemination of knowledge - which is to say, its CONTROL - have been RELIGIOUS AUTHORITIES and THE STATE, and one or the other typically provided both the financial means and the ideological ends for compendium projects'. Against the backdrop of this quote, why is it important to devise your own opinion on every subject, having previously conducted your own private investigation? Discuss at length.