The Origin of Evil

So I haven't posted in forever, not like it matters... But anyway, this semester I took a course on Biblical Hermeneutics, which is the study of interpretation and translation in regards to the Bible. Well at one point in class the professor mentioned a passage in Revelation which refers to the sea being no more, and he interpreted that to mean that evil would be no more, because earlier in Revelation the beast, which definitely represented evil, rose up out of the sea, and so the professor proceeded to equate the sea with evil. Well, this did not sit well with me, and so I began to write furiously on the back of our handout(he loves handouts). Here is what I wrote:

"When John mentions/adds the fact that the sea will be gone (no more), I do ont think it is the case that he is referencing the evil represented by the sea. A close reading of Genesis 1 will show that there is no mention of the creation of the sea (water). "The Deep" is mentioned, and God separates the Deep into the sea and the sky. He does not create it, He only separates it. So the significance in John is that not only will God destroy created things but pre-creation things as well.
It is possible that one can still allude the sea to evil, since there is no explanation about how evil came to be. In this case, the Deep could be a possible source of evil, as most Christians will not tolerate the thought that God created evil. Which begs the question, If not from God, where did evil come from?
Personally, I believe that in some way evil came from God. Without evil, He cannot be glorified in every aspect of His being. His goodness cannot be glorified if there is no evil to compare it to. His mercy and grace cannot be glorified if we did not fall and become in need of it. Therefore, in order to be fully glorified, I believe God created evil. It's that or evil is also eternal. Once again, the significance of the destruction of the sea can be seen as God destroying something that He did not create, which would glorify His omnipotent power."

As you can probably tell, I was writing fast and didn't really pace myself enough to make transitions between thoughts, so it might a little difficult to follow, and I apologize for that. Basically the conclusion i came to is that either God is the creator of evil, and ultimately its destroyer as well, or evil, like the sea, is an eternal object like God, and that He is so powerful that He can destroy even other eternal things (which of course would make them a little less eternal than they thought =)).

I've never really heard any other suggestions for the origin of evil. I feel like Christians like to believe that Satan (or Lucifer) created sin, although they would probably never actually say it, because that means that God is not the only being with the power to create. Maybe He is, maybe He isn't. I'm not sure that we can really know. But my purpose in writing this is to put some questions in your head, and if you don't like it, that's too bad because you shouldn't be following me anyway...