What It Might Have Been

I know you know that we're through
 I know you know what you've got to do
 Knowing it, showing it's just a part of it
 But I got a clue
 It ain't what I know that makes me blue
 It's what I thought I knew.
 I lost a lot of things, 'fore you came
 I know that losing is just part of the game
 And I'm sure I'll lose more, but all the same
 It ain't what I lost that makes me sad
 It's what I thought I had.
 Well it is what it is, let it go
 It ain't what it was, that's for sure
 Things will be what they'll be
 In spite of me or you
 Even though
 It ain't what it is that's such a sin
 It's what it might have been.
 Oh, it is what it is, let it go
 It ain't what it was, now we know
 Things will be what they'll be
 In spite of me or you
 Even though
 It ain't what it is that's such a sin
 It's what it might have been.