Q. 1. Over the years, I have come to the conclusion that I do not believe in everything that the Catholic Church teaches, such as the teaching about purgatory, the Virgin Mary, etc... Does that mean that I can no longer go to the Holy Mass?
A. 1. Anyone can attend the Holy Mass, believers and non-believers. This open door policy permits the grace of God to touch those who are about to convert to the Catholic faith.
While you can attend the Holy Mass, you have to do an examination of conscience to determine if you qualify to receive Holy Communion. When you receive the Holy Eucharist, you are stating by your actions that you believe in the entire content of the Creed. If there is one or more parts of the Creed that you do not believe in, then you are no longer in a state of grace. You should not be presenting yourself for Communion. By going to Communion, you would be doing it without the belief in what the Catholic Church stands for.