Satan exists. He comes only to steal, kill and destroy. (John 10:10)
Jesus exists. He has come that we may have life, and have it to the full. (John 10:10)
Humans exist. We are neither only good, nor only bad. (Genesis 1:27 & Romans 2:9, 7:14-23)
I've struggled with seeing people in their human category, in shades of grey. I have a propensity to either adore and revere people so highly they're close to being on the same level as Jesus or God to me; or such a disdain towards them they could practically be holding a pitch fork for all I know. Either way, it is a distortion.
I'm learning that much of life, particularly when lived from the mature adult perspective, falls into shades of grey. Categorizing much of life, especially people in either black or white categories is more age-appropriate for children. When I was a kid watching movies, I'd want to know who were the good guys and who were the bad guys (OK, I guess I still do). The in between didn't exist.
Humans are in shades of grey. While certain human behavior and conduct can be on one end of the spectrum, humans themselves aren't either one or the other; all good or all bad. In my limited observation, much of human behavior is all over the spectrum as well. We can be amazingly kind and compassionate in one moment, and very cruel the next. When we judge a person's value by what they do, we are eating from the tree of the knowledge of good and evil. There is no "grey" fruit on this tree. This causes distortion, not wisdom. When we start to see others in either one or the other category, truth gets covered. People are neither God nor the devil. They are simply people.
To be better equipped to live life well on life's terms, I can be comfortable with seeing circumstances and people, including myself, in the many shades of grey, and not get anxious about it. That is peace. That takes crazy surrender.
