If matters of pure reason had to be left to dogmatic procedures, and if the opponents really had to be disposed of polemically,.e., in such a way that one must enter into battle armed with grounds of proof against opposed assertions, then nothing would be more advisable in the short run, but at the same time nothing more vain and fruitless in the long run, than to place the reason of the young under tutelage for a long time and protect it against seduction for at least as long.