Can good exist without evil?

A friend has commented on my first post...

"...perhaps you should be asking, can good exist without evil?"

Can good exist without evil?...an interesting question. Is the existence of 'good' dependent on the existence of 'evil'? Is there a clear mark to separate good from evil? Or...do they have to exist together?

A question that may be similar to that: Can light exist without darkness?

The implication...there seems to be no meaning of goodness if wickedness is not known. In order to understand goodness, one needs to understand wickedness, first of all. Perhaps that shows how saturated human beings have been with what is evil around the world. Goodness is interpreted from the perspective of 'evil'?

As long as this present world exists, good and evil always exist together. And perhaps many times also we have experienced the combination of the two...good evil...an evil that is good?

I don't have all the answers right now. But this is a journey to discovery...