Bipolar people are God's circuit boards. They have wires sticking out all over the place, they're a total mess, but God controls when they turn manic and when they're depressed. It's like 1 and 0 in a computer. It serves a function though the circuit board cannot know what the function is. It just has electricty flow through itself in various channels, signals that operate other parts of the system. It's the "I am not a foot" parable again. "I'm not a monitor" or "I'm not a keyboard." or something that makes sense like a cooling fan. Internal logic that only makes sense to the creator. That's what the function of a bipolar person is.