"With willpower, I think about the balancing point between having the determination to start something and having the wisdom to stop. When I was younger I would reach a point in my tidying where I would throw out almost anything. My brother's stuff, my sister's--even my parents' and my teachers' things weren't safe.
What for many people is so difficult to start [WSJ] --tidying--was sometimes difficult for me to stop. One of the most common questions I hear is 'Your book helped me, but what can I do about the messiness of my husband, wife, co-worker, etc.?' I always answer the same way: 'Nothing. You can't change them, and you shouldn't try.'
Show them what you have achieved through your tidy room, your freer soul, and let them find their own way forward. Willpower is not only the drive to change yourself, it's also the sense of understanding that this power has limits."
The Life-Changing Magic of Tidying Up by Marie Kondo.