Mental strength is like muscle strength — no one has an unlimited supply. So why waste your power on things you can't control?
For some people it's politics. For others it's family. For others it's global warming. Whatever it is, you care … and you want others to care.
Fine. Do what you can do: Vote. Lend a listening ear. Recycle and reduce your carbon footprint.
Do what you can do. Be your own change, even try to change people around you as much as you can — but always remember that there will be things, and people, you won’t be able to change!
- Jeff Haden (modified by Amr Badran)