Answer

Pope John Paul II’s remark is consistent with the constant teaching of the Catholic Church. Notice that he uses the word "reject" which, in context, means making a conscious decision against the Church that one knows to be founded by Jesus Christ.

The Catechism of the Catholic Church text confirms this: "They could not be saved who, knowing that the Catholic Church was founded as necessary by God through Christ, would refuse either to enter it or to remain in it" (CCC 846, emphasis added).