Bipolar people are torn between emotional extremes.
People with the Bipolar neurotype tend to oscillate between emotional extremes. They spend significant portions of their time dealing with depression, and then when they’re not depressed they can be hypomanic or even completely manic.
Most people understand depression — a constant state of exhaustion, anhedonia where nothing is interesting or joyful, a need to sleep a lot, difficulty engaging with the world, etc. It sucks.
Mania is a bit more complex. In some cases it’s the “fun’ part of bipolar — bipolar people may enjoy their manic periods, delve into interests or projects, take joy in things they’d otherwise ignore, etc. In other cases it can be pretty problematic - extreme mania can lead to poor impulse control, lousy financial decisions, even delusions.
The good news is that Bipolar is effectively managed with medication which will normalize the emotional volatility that these people experience.