"I'm sorry."

It's a statement that gets pretty old when said too many times. I've heard my fair share of I'm sorrys. I've always accepted the words, and acknowledged that it takes a big person to even say it and actually mean it. But, as I continue to hear this from people who have messed up and hurt me, I've started to wonder, do the words ever get old? Do they, at some point lose their sincerity if they are constantly said by the same person?

How many times can you apologize before people stop believing you?