Testing if a theology is from God: Reasoning from the fruit of the Holy Spriit

As a corollary to the previous study of the Holy Spirit, it also seems to follow:

If:

a) the fruit of the Holy Spirit in our life is love, joy, peace, patience, kindness, goodness, faithfulness, gentleness and self-control,

And 

b) the fruit of a certain theological system in our life is something besides love, joy, peace, patience, kindness, goodness, faithfulness, gentleness and self-control,

then it follows that 

c) that theological system is not formed by the Spirit of God. 

Now, some people don't try to have their theology informed by the Spirit of God, which is its own problem. But for those who do, here the Bible has given us another way to test the spirits. Or as The Man once said, by their fruit we know them. 

We probably all have some work to do.