Oh, I have several~ You can take your pick from such amazing ones as...

[She puts a finger to her chin, tapping it as she thinks (again, about two half-measures too long).]

It could always be worse~
Every cloud has its silver lining~
We're never given tasks we can't grow to overcome~
With friendship, we'll be sure to get through~
What doesn't kill you makes you stronger~
Keep a stiff upper lip~
Keep calm and carry on~

[Another tap on her chin.]

That's all I can think of at the moment, I'm afraid~ I do have more, but they don't apply to hard lives~