You must do the thing you think you cannot do.
“No one can make you feel inferior without your consent.”
“Happiness and freedom begin with a clear understanding of one principle: Some things are within our control,…”
— Epictetus
“For truly in adverse fortune the worst sting of misery is to have been happy.”
— Boethius
“Soon you will have forgotten all things; soon all things will have forgotten you.”
— Marcus Aurelius