If this were true, then should I know this secret.
6 seconds sound clip from the Julius Caesar (1953) movie soundboard.
You can hear this line at 00:39:31 in the DVD version of the movie.
Quote context
[...]
- Dwell I but in the suburbs of your good pleasure?
- If it be no more, Portia is Brutus' harlot, not his wife.
- You are my true and honorable wife, as dear to me as are the ruddy drops that visit my sad heart.
- If this were true, then should I know this secret.
- I grant I am a woman, but withal a woman that Lord Brutus took to wife.
- I grant I am a woman, but withal a woman well-reputed, Cato's daughter.
- Think you I am no stronger than my sex, being so fathered and so husbanded?
- Tell me your counsels. I will not disclose them.
[...]