What does "I believe in yesterday" mean?

An observation first attributed to Psyche, ca. 700 BC :wink:

You know, no one EVER talks about what a bitch Psyche was. But, seriously, she was not a pleasant woman to be around. Complained about every little thing. Snored. Once beat a donkey to death with her bare hand because she THOUGHT it might be about to crap in her presence. And that’s just the stuff that made the papers.

Eros was well rid of that trollop.