I think that if a person persisted in denying a well established a-priori like the Sun will appear above the Eastern horizon tomorrow morning, barring bad weather, that I would simply not debate the issue in preference of letting him believe his own eyes when the morning event arises again.
Anything faith based and intuitively known as well, with some degree of scientific evidence present incomplete in its entirety, should be open for discussion. Those who will not discuss these things tend to have an investment in what they believe. If it is simply not wanting to go on because of the feeling of being ill prepared for such an endeavor, politely withdrawing is fine.
A Christian friend of mine said that he did have proof presented to him when I challenged the claim that the Bible is filled only with words that came directly from G_D. He wouldn't go any further. So I guess I was left to imagine he was visited by an Angel or G_D. This present life wave of humanity has enough of its own karma to deal with. Why should we enmesh ourselves into that of other beings with-out the human family? Such as the pleiadiens, ra, or whoever?
Isbener Aldane says: " I raise my eyes toward the stars, from which help will come to me, but I always follow the star which guides my interior. "
I like this one too. Even though I'm not sure I understand it completely:
"Lo, warrior! now the cross of Red
Points to the grave of the mighty dead:
Within it burns a wondrous light.
To chase the spirits that love the night.
That lamp shall burn unquenchably
Until the eternal doom shall be."
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"No earthly flame blazed e'er so bright." -- Sir Walter Scott
Good judgement comes from experience; experience comes from bad judgement.
You have to believe in the impossible in order to become.