I have a question that's been occupying the majority of my thoughts lately. I was debating with a Jehovah's Witness about the possibility of free will and predestination coexisting (yeah, that's an easy enough topic). I found that I could not satisfactorily answer nearly any of his questions. This was embarassing and kind of alarming. I've always thought that I had a pretty good grasp of Reformed doctrine, but I guess I don't really have it on this one. But anyway, my question is: how can God have ordained the Fall, but not intended it? Since God created (or in some cases allowed) everything that has happened, is happening, and will happen, how can God not have intended for man to fall? Does he, say, have all the possibilities mapped out, and if we do this then this happens (cause and effect)? Somebody with more knowledge than me, please help!

In the midst of your sadness and woe, when you are tormented and afflicted, have comfort! God's will is done.