Aquinas - The Fifth Way

In the fifth way itself, Aquinas just talks about natural things. But I think you are warranted in saying that he applies this to intelligent agents as well. So what brings the human will and the operation, qua good? If it's just some sort of, you know, limited instance of the good is not something that brings the humanWill to rest. The proper object of our will is the good beyond which nothing further can be willed, which can only be found in God, the good itself. We always take rest in some sort of good that can't be willed for another.