Goodness is of God and all things are used for good by God. However we have the issue of evil and wrong doings in the world, so what's up with that? Well, forgive it and bring a new attitude (light) to the darkness. Bring an attitude of forgiveness~gratitude, and most of all love. How can we act in this way? Only through God's power flowing through us, not on our own fumes. Give thanks, give blessings back to Yahweh constantly and watch all darkness disappear. As a matter of fact if we all did this at the same time, we would be swept up in bliss and a New Earth would appear!
1 Timothy 4:4
For everything God created is good, and nothing is to be rejected if it is received with thanksgiving,