A Bridge of Ethical Discussion

This blog is less relevant to Thus Spoke Zarathustra and more of an extension of my paper I guess. I'm writing my paper on the teleological suspension of the ethical and while reading Kierkegaard and his arguments, I keep thinking why? What is ethics? What determines whether something is right or wrong? Is it Religion? Laws? self-infused morals and instict? Is ethics what is socially acceptable in our society? Furthermore, is what is ethical a universal? Or is there gray area of what is right and wrong? Is what is ethical for me be unethical for someone else and vice versa? Can there be any one thing of which we say "Yes. this act is right in all situations!" or "No, this act is wrong in all situations." I venture to say that there is no act of which is so pure of which it cannot be considered unethical or any act that is so corrupt that cannot be justified in some way.