I've no doubt that fear is natural, but I suppose the difference for me lies in the distinction between instinct and phobias, and wariness and fear - obviously, one should be wary of those with obvious intent to do harm, or something powerful and monstrous that one has never seen before. One should be wary of the dark. One should be wary of abnormal situations in which one's life is on the line. All of that is natural and understandable and part of the will to survive, as is the fight-or-flight response that humans experience in response to that wariness.
However, there are other sorts of fear that aren't driven by logic or instinctual necessity - enclosed spaces where one is perfectly safe, for example. Crowds. Too much eye contact. Dolls. Insects, harmless or otherwise. And then there are deeper fears that I have to question the source of - that sort of existential fear that I mentioned, where one fears their own humanity, morality, mortality and lack of boundaries beyond that which they inflict on themselves.
It's those latter ones that I tend to think about, moreso - they serve no real purpose with regards to survival, they simply seem to exist because we're capable of thinking about things too much.
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However, there are other sorts of fear that aren't driven by logic or instinctual necessity - enclosed spaces where one is perfectly safe, for example. Crowds. Too much eye contact. Dolls. Insects, harmless or otherwise. And then there are deeper fears that I have to question the source of - that sort of existential fear that I mentioned, where one fears their own humanity, morality, mortality and lack of boundaries beyond that which they inflict on themselves.
It's those latter ones that I tend to think about, moreso - they serve no real purpose with regards to survival, they simply seem to exist because we're capable of thinking about things too much.