[randomsilence]

>The idea of venting can be traced as far back as Aristotle, but Freud is the one who really popularized the notion of catharsis. Most of what we assume about the need to “let it out” comes from his assertions about the danger of unexpressed feelings.

When it comes to 'let it out', it should be traced back even further to the Iliad. At least according to this [1] video by Lindybeige, the Iliad is all about forgiving, after having exhausted every other option, aka after letting it all out.

Having said that, the article seems to make a negation error. The opposite of not expressing feelings is not expressing all feelings but expressing some feelings.

[1] https://www.youtube.com/watch?v=aofPdMbXzUQ The Iliad - what is it really about?