Seattle Catholic today links to this article by Fr. Hugh Thwaites, S.J. http://www.latin-mass-society.org/thoughts.htm:

“When people forget about Original Sin, they are unaware of the chronic weakness of our intellect and wills, and of our chronic tendency to slide into error and sin. Our faith needs a frequent input of doctrinally nourishing liturgy if it is to stay pure. The traditional rite of Mass provided this. The new rite does not.

There is nothing wrong with the new rite. Rome cannot feed her children with poison. But the new rite of Mass does not give us what we need. Michael Davies’ analogy is helpful here. If a doctor tells a couple that their child need milk every day, and they give the child only water, the child may not live. There is nothing wrong with water. But if the child needs milk, water may not be enough.

There is no heresy in the new rite. Rome cannot authorise heresy. But the new rite, it would seem, does not give us enough Catholic doctrine to prevent Catholics from unwittingly becoming Protestant in their thinking. As Fulton Sheen put it, ‘If you don’t behave as you believe, you will end by believing as you behave.’ The new rite of Mass is capable of being carried out in a Protestant manner. Given the chronic tendency of our fallen human nature to go for what is easier, our liturgy, in the hands of the ill-instructed, will always tend to a Protestant interpretation. And Catholic liturgy carried out in a Protestant manner will lead the worshippers to Protestantism.

‘Where will it all end?’ So far as I am concerned, it has ended by my being resolved to offer Mass, as much as possible, in the traditional rite of the Church. This rite exactly expresses my eucharistic faith. The new rite does not. Neither does it nourish my faith. The traditional rite of Mass has nourished the faith of countless Catholics in the years past. Please God it will do the same for me, and for many others, in the years to come.”