Prospero is speaking to Ferdinand I know this because Prospero says ‘all thy vexation were but my trials of thy love’ we know he’s speaking to Ferdinand because noweone else loves Miranda. Prospero is saying he wanted to see how strong his love was for Miranda, he was forced carried massive loads of logs, and to Prospero’s surprise he passes the test. ‘Then hast strangely stood the test’ when he says this he is saying he is surprised he has stood the test. He may also be shocked because he didn’t believe a man like Ferdinand would be worthy of Miranda, his daughter’s love