Such a simple concept.
Good and Bad.

They say oil and water don't mix,
As they pour both into the glass.

There's a little bit of good in every bad situation,
When one door closes, another opens.

I can tell you about the worst day of my life,
now ask to me tell you something good about it.

Sweet and Sour,
Good and Bad.

If you think about it long enough,
You probably can't tell which is which.