Of sound and unsound minds

I think, Socrates then Cicero exaggerated things a big deal when they said

All silly people were unsound

But I go ahead of myself.

Sound here means minds that are under no perturbation from any motion as if it were a disease and unsound are those that are differently affected.

It’s this statement by Cicero in his disputations that I think is a stretch. He writes

No fool is ever free from perturbations of the soul; but all that are diseased are unsound; and the minds of all fools are diseased; therefore all fools are mad.

He says elsewhere that grief, being a disorder of the mind, cannot afflict the wise. This he writes is because, the man of courage is the only wise man and as such, grief cannot befall him.