From a previous thread:
From the earliest of Church Councils (the Council of Rome, 993; defined by the Council of Trent) the distinction was made between worship and honor. Catholics believe that worship is due to God alone. Catholics honor those saints who have gone before us as a sign of faith and victory in living the Christian life.
And from another previous thread:
The truths about Mary are important because they are still truth, since they are based in the Bible. But they are not central to the primary gospel message of our salvation through Jesus Christ.