Have One Without The Other

I often hear people talk about opposite emotions and opposite reactions in life.  Often, people exclaim how wrong anger is or how they want to take away pain, or how they only have love.  While these are noble and honorable parts of life, I really don't agree that you can have one without the other.

After all, if there is not pain in life, could one experience pleasure?  If there was no anger in life, would we know what peace was?  If there was no hate, would we be able to identify love?  Could we be happy without knowing sadness or depression?

Maybe I'm being too simplistic, but in many ways if you you only have one side of the emotion, would you really recognize it?  I'm not so sure we would.  I believe it takes these other sides of life to bring about our awareness into what is possible.