Is Evil in the World Necessary for Some Good Purposes

What is the argument 'from Evil for the non-existence of God'? To sum it up; "the traditional conception of God is as omniscient (all-knowing), omnipotent (all-powerful), and benevolent." (Existence-of-God.com). "This implies that if God exists then he knows how to, wants to, and is able to prevent all suffering." (Existence-of-God.com). "If such a God existed, though, then he actually would prevent all suffering. Suffering though, is a familiar part of the world around us; it has not been prevented. There is, therefore, no omniscient, omnipotent, and benevolent God." (Existence-of-God.com).

So my question is, "Is evil in the world necessary for some good purposes?" In my opinion I think that yes it is good, and no it isn't good. A saying I was told once was, in order to succeed, sometimes you have to hit rock bottom. To me that says that yeah life can be some kind of evil at times, but you have to realize you can only go up form there. Once you have hit bottom, you can't go down anymore, but only up! But, for some people I know things can take a turn for the worse when they hit rock bottom. It depends on the person if this strategy is going to work on someone or not. So my conclusion is that such evil is necessary for a god purpose. For example: hot water would not exist without cold water existing; otherwise it would just be water. Other examples are: on and off, up and down, light and dark, and positive and negative. Three explanations as to why evil exists. One, it just happened by itself, which would imply God is not omnipotent. Two, God created it. God creates everything so why not evil as well? Three, God can be portrayed as both good and bad evil. A question I've always had was, If God created the universe and everything in it, where did evil come from?

First lets do a little blurb of each of the four of Philo's arguments. "The first circumstance which introduces evil is that contrivance or economy of the animal creation by which pains, as well as pleasures, are employed to excite all creatures to action, and make them vigilant in the great work of self-preservation." (Feinberg, Joel). "But a capacity of pain would not alone produce pain were it not for the second circumstance, viz., the conducting of the world by general laws; and this seems nowise necessary to a very perfect Being." (Feinberg, Joel). "For the third circumstance which I proposed to mention, viz., the great frugality with which all powers and faculties are distributed to every particular being." (Feinberg, Joel). "The fourth circumstance whence arises the misery and ill of the universe is the inaccurate workmanship of all the springs and principles of the great machine of nature." (Feinberg, Joel).

What I think of the first circumstance is that I agree with what I researched on it. The first circumstance basically states that both pain and pleasure both motivate humans equally, but the only reason evil is even around is because people choose to constitute it. (Existence-of-God.com). I absolutely, one hundred percent agree with this statement. For example: people go to jail, because they choose to do ignorant things. Evil is not a thing, but a wrong choice. People go to jail for the most