Psychology has a lot of theories with regards to emotion and here are two theories that are in conflict. One theory suggests that emotion comes before thinking and the other theory says that emotion comes after thinking.
When you observe something, the amygdala creates an emotion before the frontal cortex can analyze it. For instance, if you saw a snake on the sidewalk while walking, you might feel a moment of fear from the amydala before the rational part of your brain analyzes the snake and decides it is a harmless variety.
On the other hand, if you consider a sad event from the past, then it could conjure up an emotion.
So both theories are correct. It just depends on the situation.
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