Have you ever wondered why exactly the spirits are so helpful? For years I suspected there was some plot or conspiracy behind what was going on, from the GWB to the Illuminati. When I went through a fundy phase, I was convinced they were demons trying to lead me away from Christ (never mind that they all pointed me back to Christ anyway). In my secular human phase, I assumed the advanced technology of some members of society was being used to manipulate otherwise talented individuals to keep them from interfering with the plan for interdimensional control.
I think I've finally got it figured out. It has to do with their intrinsic nature. Each of these spirits is a self-conscious non-corporeal intelligence. It was created (or emmanated) in order to direct a current that influences manifest reality. For instance, Jupiter is an aspect of God that is assigned to dignities, prosperity, and offices of authority. Venus is an aspect of God that has influence over the domain of the heart. They each have a set of skills and talents that they're really good at.
These spirits are helpful because that's what they do. They want to spread love, or assign dignities. That's what they exist for. While they have general work to do, every time a specific mage calls upon them or their representatives, they have the opportunity to work with another intelligent aspect of God that wants to communicate with them. It brings them joy.