Imagine a deep calm sea, no perturbation anywhere. Now imagine that this sea is disturbed. So now there will be crests as well as troughs.
Now the question is: can there be any crest without any trough?
That means there cannot be any good without any evil;
There cannot be any love without any hate;
There cannot be any compassion without any cruelty;
There cannot be any joy without any sorrow;
There cannot be any beauty without any ugliness;
There cannot be any justice without any injustice;
There cannot be any greatness without any meanness;
There cannot be any life without any death;
There cannot be any virtue without any vice;
Etc.
Deep calm sea without any perturbation is the state before creation. Creation will bring everything along with its own opposite.