Duality Options

What attitude should I have toward duality? It has long been a question in my mind.
I've try to meditate on this topic and finally accept the idea of "Good is evil ; Evil is good."

I try to embrace both the light and the dark. Problems came here.
When I heard the others' malice words, saw some "improper act", I force myself to stop criticising and resisting but embrace them, but headache had develeped whenever I do that, I can feel the "negative thoughts" fogging and causing the pain inside my head . A week ago, I even got a fever /_\ . I made effort to 'produce' some positive emotion, I felt both happy and woe at the same time, sound weird? Now, I just stop awaring of the thoughts and feel better now. However, I want to confront the idea of duality. Could you guys give me some advises and your point of view over duality ?

My learning process is also affected, as my strifing toward my goals, doing meditations, during rituals, the opposite results ' pop out' , annoying and distucbing me. If I do the same way and accept it, I will fail.And if I accept that fail means success, I will fail ! What should I do ?

And I heard that, the world is in equilibrium, because there are the good and the evil are balancing each other.If I develop myself totally toward the good side, will there be anything evil opposing aginst it in my own system? Also, I wanna ask, is that mean the god is satan? or satan is only an aspect of god ? As the god is everything.

A different meditation you may try other then this is good and evil are relative. One persons evil could be anothers good. Duality is created by humans. Nature dose not recognize duality. The wolf kills the fawn for food, the other der do not recognize the wolf as evil just dangerous.

This is my perception for the most part, and I try to avoid using the terms "good" and "evil." Certain acts, however, I think of as "justified" or "unjustified." It may seem like I'm just playing with semantics, but there is a difference.

Example: Is murder itself wrong? No. The act itself isn't wrong, but the motivation behind the action may be put into question. If a burgler is attacking a man's family with a knife and the man kills the burgler in defense of his loved ones, that murder was justified, however, a mugger who kills someone on the street for not cooperating has performed UNjustified murder.

I find that it is easier to accept the fact that there is no good or evil when you look at motivations in the context of justified vs. unjustified.