text: The core problem is that the Church is not ready to admit that it sometimes teaches erroneously. For example, in former times, slavery was seen as acceptable and levying of interest was grossly immoral. Its current teaching with respect to human sexuality is simply unsustainable.
  
  But the church doggedly ignores the fact that "...few Catholics ever live up to the church’s moral norms governing sexual activity."  Instead of seeing that it "lays heavy burdens on people's shoulders" (Mt 24:3), and admitting that it is wrong, the Church tries to explain the matter away by referencing "original sin" -- a doctrine that itself is dubious. (There was no prelapserian state of bliss and no "falling down" but, rather, a "falling up".)