Philo:
Would you say the Eucharist is a requirement to escape hell? Or do you think that Protestants who receive merely bread have a chance of making it to heaven, albeit by way of Purgatory?
I think āa requirement to escape hellā is a very negative way to put it. The Eucharist is the very best way to develop a loving, intimate relationship with Christ. When we receive Communion, Jesus gives Himself to us completely, Body, Blood, Soul, and Divinity. And at the same moment we should be giving ourselves to Him completely.
We begin on earth the relationship that will continue for all eternity. If we love Him the best way we can here on earth (the way He laid out for us, not āour own wayā), we will be with Him for all eternity (heaven). If we separate ourselves from Him by sin, reject Him, intentionally disregard the sacraments He has given us for our salvation, that non-relationship will continue for eternity (hell).
Those who know that the Catholic Church is the Church Jesus founded are obligated to do whatever is in their power to unite themselves with the Church and make use of the gifts God has given us in the Sacraments. Failure to do so may put their salvation in jeopardy. (Only God can be the final Judge for any individual.)
Those who, through no fault of their own (e.g., invincible ignorance), do not understand the importance of being united with the Church and partaking in the Sacraments Christ gave us might have the possibility of salvation if they seek God in the best way they are able.