The Question: Where is the line between faith and foolishness?
The Answer: There is no answer because the question is flawed.
Explanation: The question tries to set faith and foolishness as opposing terms, but foolishness is not the opposite of faith.
New Question: What are the correct opposites and how does that help answer the question that we’re really trying to ask?
Faith is the opposite of Unbelief.
Foolishness is the opposite of Wisdom and or Reason.
Faith can be foolishly applied to people, things or situations that are not worthy of it. When we don’t use wisdom and reason to choose where we place our faith we are foolish. But acting on a faith that is based in something or someone trustworthy is NEVER foolish. To not act on this professed faith is evidence that we don’t really posses faith in said person or thing at all and, by definition, are acting on unbelief instead.
In this thought process we see another contradiction in a popular view. We see that faith and reason are actually on the same side rather than opposed as some would like us to believe. It is true however, that faith often defies reason in its execution. But where faith is applied should be selected with reason and wisdom or else we are likely to find ourselves putting faith in places it doesn’t belong. God does not shy away from reason or wisdom. He invites us to study Him, search Him out, and evaluate His words and actions.
(Psalm 34:8, Jeremiah 29:13, Malachi 3:10, Acts 17:2; to name a few)
Faith: Belief in, devotion to, or trust in somebody or something, especially in the absence of logical proof. (Synonyms: confidence, trust, reliance, belief, devotion, commitment)
Foolishness: showing a lack of good sense or judgment, seeming ridiculous (Synonyms: stupidity, idiocy, silliness, imprudence, thoughtlessness)
Reason: the ability to think logically, regarded as a basis for knowledge, as distinct from experience or emotions. (Synonyms: good sense, intelligence, logic, wisdom, mind)
Wisdom: the ability to make sensible decisions and judgments based on personal knowledge and experience. (Synonyms: understanding, knowledge, insight, perception)
Unbelief: to not accept that something is true or real, to be uncertain or lack confidence in a person or thing. (Synonyms: skepticism, agnosticism, atheism, faithless)
