The error message means that the tests expected this string to be the output from your function:
'I Should Just Stop Tweeting, The Human Conciousness Must Raise Before I Speak My Juvenile Philosophy.'

But instead your function returned this string:
'How Can Mirrors Be Real If Our Eyes Aren't Real' to equal '

Think about how your function could work with any string, rather than just the one you've pasted into your code. If you're still unsure, try to define a simpler function on String.prototype and call it on any string to see how it works.

You must read the log like this: expected "Your answer" to equal "The correct answer". Have a look there to debug your code: https://docs.codewars.com/training/troubleshooting

what is this? expected 'How Can Mirrors Be Real If Our Eyes Aren't Real' to equal 'I Should Just Stop Tweeting, The Human Conciousness Must Raise Before I Speak My Juvenile Philosophy.'