You Don't Know a Good Thing

You don't know a good thing When you see it, when it's right before you You don't know a good thing When you have it, so you'll lose it I give all my time to you Am I a fool? Who needs this? But if I was down on you, what would you do? If I don't bring a thing, so You don't know a good thing When you see it, when it's right before you You don't know a good thing When you have it, so you'll lose it But if I found someone else Who needed me and left you I've been thinking 'bout myself and no one else All I'm trying to say is You don't know a good thing When you see it, when it's right before you You don't know a good thing When you have it, so you'll lose it