so just because bad things happen doesn't mean you are the only one going through hard times.

Rightly said @dragonslayer109

Most people tend to think their situation is the worst, you might see someone smiling but you don't know what he/she is going through. The smile is to cover their suffering. More like

suffering and smiling

You might be going through hard times but out there, someone is going through a situation tougher than yours. Hard times don't last forever.