This is SO TRUE - You really don't understand it fully until it happens to you. "There are some people who could hear you speak a thousand words and still not understand you. And there are others who will understand without you even speaking a word.
Don't let someone who did you wrong make you think there's something wrong with you. Don't devalue yourself because they didn't value you. Know your worth. If you have a couple solid people in your life you can trust, you're golden.