George Hammond, Author, Rational Idealism and Conversations with Socrates

The dichotomy between good and evil was popular long before Zoroaster was born, and it will probably continue to be long after Manichaeism's last influences subside. But is evil a useful concept? Or an obfuscating one? The big solution to this big problem in understanding reality comes from comparing the concepts of good and evil to the less emotionally fraught concepts of hot and cold. They appear to be opposites at first, but are actually relative labels we apply to our experiences that depend both on an objective reality and on the relative perspective of the perceiver.

Understanding evil this way vastly reduces the fears that have scared us silly for centuries, and provides a tremendous boost to the effectiveness of our pursuit of happiness—a big solution indeed.