the difference in Finished and Completed

No English dictionary has been able to explain the difference
between the two words 'complete' and 'finished' in a way that's so
easy to understand:

Some people say there is no difference between COMPLETE & FINISHED but
there is:

When you marry the right one, you are COMPLETE....

And when you marry the wrong one, you are FINISHED.....

And when the right one catches you with the wrong one, you are ...
COMPLETELY FINISHED!!!