Listening to Malachi martin on art bell. He said the third secret of Fatima was in Daniel 12, now that implies there's nonforgivness of sins for the last three and a half years. But the Catholic church never taught this ?
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Wow, there is so much wrong in those two lines that my head is spinning. First of all, if you want to find out what the Church teaches, the last place you should look is either Malachi Martin or Art Bell. The Book of Daniel is also not recommended either, since it is a book of Old Testament prophecy and not a book of instruction in the Catholic Faith.
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Regarding the third secret of Fatima:
1. No one knows what it says, so any discussion of it is idle.
2. It is not predicted in the Book of Daniel.
3. It is only a private revelation anyway, so it does not determine what we believe as Catholics.
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There is always forgiveness of sins for those who are sorry, up until the last moment before the end of the world. You seem to know this, as you are suspicious of someone saying the contrary. I'm not sure what you heard, but if any source tells you that there will be no forgiveness of sins in the last 3.5 years of the world, discontinue reading or listening to that source as it teaches error.