I would respond:
*We’ve been given our orders.*
And yet the RCC discourages those orders.
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**You can probably see a parallel to a similar objection to Calvinism.**
Not at all. Calvinism doesn’t teach universalism. We are commanded to go spread the good news. We don’t know who is elect and who isn’t. We do what we are told, which is GO. God takes care of the rest.