Nothing is miserable unless you think it is so

Nothing need be apprehended from this miserable adventurer.

Nothing. I was miserable. I didn't wear this shirt, ... I refused to wear it.

No one is more miserable than the person who wills everything and can do nothing.

For in every ill-turn of fortune the most unhappy sort of unfortunate man is the one who has been happy

Nothing is miserable unless you think it so; and on the other hand, nothing brings happiness unless you are content with it.