So you are in effect saying that Cardinal manning did not actually say what you asserted, but let's just ignore that and go on to the next attack. OK, let's do. In His infinite and perfect wisdom God did not leave us a book and a challenge to debate it endlessly. He left us a timeless Church with a living Magisterium.
Peace be with you
Nope. He left us with His written word and the Holy Spirit within us. That way there was no chance of some corrupt group in Rome to usurp His authority with true believers.