The things left unsaid are usually more hurtful than things left unthought (Ask me how I know).
It's the things left unsaid that eat into the light of your usually big heart (Ask me how that feels).
It's the things (I) left unsaid that leave you (who says them) in a quiet little space (unaware) that I'm not as good as you're trying to convince everyone that I'm not.
If you don't have anything nice to say, don't say anything at all. This has not been a hard concept for me to grasp... But I sure wish my mind would quiet down, too.