How to retrieve text messages?

I was wondering if/how I can retrieve text messages and/or iMessages from a contact I blocked. I've now unblocked them, however, I'm curious to see if the person contacted me while they were blocked. I have an iPhone 4 btw.

You blocked them for a reason, so the way blocking works is this. ANYTHING and I mean ANYTHING that they sent you as a text was actually blocked. And it stays blocked. So when you unblock them, the ONLY way to get anything they may have sent you, is to ask them to resend all text, after you hit BLOCK.

Otherwise you would have just muted their text, and read it later when you wanted more attention.