Things cant truly be what they are without an opposition to say what they aren't.  Without bad, there would be no good.  Without hot there would be no cold.  Without negative, there would be no positive.  You take the things that make something what it is, and when you think about it, it wouldn't be anything special if there weren't other somethings without those qualities.  If everyone looked alike, or had the same feelings, people wouldnt even be who they are.  If everyone was an actor, acting wouldnt be what it is.  It would just be normal.  Nothing.  The same thing is true with life isn't it?  If there was no death, life could never be appreciated.  It would just be there.  So if my dad doesnt make it through his surgery today, although is may hurt those close to him, in the end he is becoming a part of what truly makes life worth living right?