Emotions have to be felt not reasoned with. This sounds somewhat arbitrary and unreasonable, why does it have to be this way? Why can't a person make rational

Emotions have to be felt not reasoned with. This sounds somewhat arbitrary and unreasonable, why does it have to be this way? Why can't a person make rational filters on their emotional experience and only experience emotion through that? How is this any less valid than behaving in a more emotionally unstable fashion?