I didn't really fully understand control theory when I took my Engineering degree at Glasgow Uni. One of the lines of study was how systems react to "impulses" - for example how a helicopter behaves when hit by a sudden fierce gust of wind (does it start to flail around and drop out of the sky?) or how an electrical system reacts to a voltage spike (does it immediately shut down or go on fire?). In general, the more "reactive" a system is (which might make it more manoeuvreable) the more unstable it tends to be.
Well engineered systems find the right balance between stability and reactivity. A system that reacts swiftly to "correct" inputs can also tend to react swiftly to "incorrect" inputs.
Your emotional wellbeing is a bit like that isn't it? Looking after your emotional wellbeing is a bit like considering whether you have the right balance between stability and reactivity. Daily life is full of "impulses" (the engineering kind, not the emotional badly thought-out decision kind).
Your alarm fails to go off at the right time. Your car doesn't start. You forget your umbrella and it's raining. Your partner was rude to you about something. Your bank balance is lower than you thought. These are all impulses that impact on the system that is our emotional wellbeing.
Helicopters are actually quite stable - they have control mechanisms that allow them to absorb sudden gusts of wind without falling out of the sky.
F1 racing cars are pretty unstable - they have to be to allow the driver to accelerate, brake, change direction extremely quickly. It's also why you see regular examples of a glancing blow between two cars causing them both to spin off the track - race finished. F1 vehicles are specifically banned from having systems like ABS and traction control which provide more stability.
I think it helps to consider your own emotional wellbeing as an engineering system. I like to think I'm pretty good at absorbing life's daily impulses and not flailing around before dropping out of the sky.
Do you need to be more helicopter?
