NN V

That which does not destroy you makes you stronger

is generally accepted to be true.

The following are not:

That which does not frighten you makes you braver.
That which does not confuse you makes you smarter.
That which does not harden you makes you softer.
That which does not blackmail you makes you richer.
That which does not soil you makes you cleaner.

Now, explain that one to your kids.