What about the Jew, for example, with no knowledge of the NT, who has steadfastly followed the teachings of the Bible and been faithful to God! Is he excluded from Heaven?
Why quote something a Pope said that has absolutely NOTHING to do with salvation?
Over the span of 2000 years, there have been great theologians who have studied Scripture. There have been Popes and Patriarchs who have convened Church Councils to discuss the truths of Scripture and establish consensus as to interpretation. Would you summarily dismiss them?
Does the Jew in your example chose to be excluded from heaven?
Are you trying to insinuate the Jew wouldn't know about the NT if it wasn't for the Pope interpreting it for him?