Sentence:  If with myself I hold intelligence, / Or have acquaintance with mine own desires; / If that I do not dream, or be not <WSD>frantic</WSD>— / As I do trust I am not—then, dear uncle, / Never so much as in a thought unborn / Did I offend your Highness. 
Meaning of the word marked with <WSD> tags:  Insane, mentally unstable.