
This question has been asked probably about 50 times now. Seriously.
Oh, it’s been answered too. Which is why you’ll have to E-C Search for it.
Yes, the Ever-lasting contrast. Since existence has known, the 'fight' between good & evil has continued. Obviously, this fight can never end. Good things turn bad, bad things become good. My fav. contrasting symbol, because it is so true & means so much – the battle between good & bad never ends… Here we ponder on the tragedy of Dylan Klebold.

This question has been asked probably about 50 times now. Seriously.
Oh, it’s been answered too. Which is why you’ll have to E-C Search for it.