Why frustration is wealth?

Frustration, if it makes you more frustrated and braver, is wealth;

Frustration, if you can learn to be indifferent, is wealth;

Frustration, if it beats you again and again, is wealth.

Everyone has a different definition of wealth. Money is wealth, health is wealth, and feelings are wealth.

You can ask the same question. Why is suffering a blessing?

I can't answer whether loss is a blessing or a curse, but I believe everyone knows that all gains can't be separated from giving.

what do you think?