Patrick answers questions about the validity of mass from home, fasting before Communion, Church's teaching on True Presence and importance of feast days in the Church.

• Patrick answers email questions about valid mass from home, why we believe Mary was immaculately conceived and why some bishops are not valid in certain rites of the Church.

• Julie - What is the reason behind fasting an hour before Holy Communion? Can I have coffee and donuts after mass?

• Patrick takes a deep dive in explaining the importance of belief in the True Presence and why the Church says the Eucharist is truly Jesus.

• Michael - How does the Church decide to move feast days on the calendar?