There were crimson roses on the bench; they looked like splashes of blood.
Dorothy L. Sayers
Strong Poison (Lord Peter Wimsey Mysteries)
For human mental health, there is an unfortunate clash between the way our brains evolved to maximise our chances of survival, and the way our mind has developed and evolved to meet the demands of consciousness.
There is a dynamic tension between them and sometimes the two act at cross purposes. The content of the mind can trigger a full-blown, physical survival response, such as a panic attack, that seems to erupt almost out of nowhere. While the fight and flight response to imminent danger, involves the inhibition of conscious thought.