There is no duality but in the mind, and as such, nothing "wins" or "loses", but is in a constant shifting flux within the whole.

But why it feels so truly so, I would see it in the fact that embodied light illuminates the darkness and reveals it, while darkness that tries to find forms, is in eternal exile within itself and it's kind, forever looking to survive as it knows not of being whole already.

All that is or could be, is but that same flux of eternity hallucinating forms within and without.

Love it or hate it, accept it or whittle at it with irony all you want and wish. Nobody wins or loses, but as concepts good and evil are in eternal battle of love and hate, never completely overwhelming or destroying each other, and even if the the whole of this universe becomes dark in the end, no starlight shining anymore ever again, then in that darkness evil too would finally rest in peace, being vanquished by it's own deeds, becoming the peace as the last light goes out, and beyond that darkness the light would still be, as loving, as still, as ever it was or ever it would again be.

And as all else too, it is all but layered illusions upon each other for each realm we could with these earthly bodies experience.

If you reach for that peace within during this life, it'll be challenging as every evil and every good thing will try to lure you back into the dualism and comparison, and the mind and heart are weak to resist it, so the spirit is needed to see over that, to create the space between where all can be as it is, without a wish to change, without denial, without praise nor hate towards anything, but with love towards all, as weirdly, when you empty your vessel of thought and will, something fills it with something so mysterious that all you can do is but watch it in awe to work it's weird loving ways in each and every moment through you.