Deluded?

Hieronimo.

Ay, I would have sworn myself, within this hour,
That this had been my son Horatio,
His garments are so like: ha! are they not great persuasions?

Isabella.

O, would to God it were not so!

Hieronimo.

Were not, Isabella? dost thou dream it is?
Can thy soft bosom entertain a thought,
That such a black deed of mischief should be done
On one so pure and spotless as our son?
Away, I am asham'd.

Isabella.

Dear Hieronimo,
Cast a more serious eye upon thy grief,
Weak apprehension gives but weak belief.