Everyone you meet is struggling with something.
Maybe a kind of pain that would never leave them until they sleep.
Maybe someone they loved that died and left them alone.
Maybe a psychological disorder that make them feel different and odd.
Maybe a mind that keeps them awake at night, overthinking about everything.
Everyone you meet or won't meet is fighting a battle alone.
Tell them they're not alone, maybe a sentence would make them feel a bit better.
Maybe your sentence would give them hope.