Sometimes, the words just don't come together. Some thoughts seem to be beyond putting into words. It is as if no words could possibly convey the thought adequately and succinctly enough to even bother trying to build a structure of clumsy words and restricting grammar around it.
It's even more difficult when you have to throw rationality out the window and deal with purely emotional thoughts... especially those so profound and powerful that they overwhelm your rational mind to the point that you can't even think straight anymore. It certainly does help when you finally find the words to at least convey some small part of that irrational emotional baggage in a concise, yet beautiful manner. You tell yourself that it will do you really next to no good, but emotions are funny things. At least the effort, whenever it is somehow successful, can bring some sort of feeling of relief.
It’s simply not always possible to rationalize everything. Sometimes, you just feel the way you feel, and that's how it is. There are times that you’ll have an overwhelming emotional download, and you just won’t be able to stop it. I have found that journal writing is sometimes the only place for this overload to go, and I know I’ve been better for it.