I've learned to live With a heavy heart And to play my part And I've learned to live With my fingers crossed When all hope is lost But how can you trust what you learned When the person you love most Isn't who you thought they were You think you know someone Like the moon knows the stars Like the light and the dark You know someone Like the back of your mind Like a moment in time You think you know someone Like you learned to love them 'Cause you think you know someone 'Til you don't And I've fallen for All your hopeless lies I've fallen countless times 'Cause I thought I knew That gleam in your eyes When they looked in mine But now I don't see you the same 'Cause the person I loved most Looks at me a different way You think you know someone Like the moon knows the stars Like the light and the dark You know someone Like the back of your mind Like a moment in time You know someone Like the sun on your skin Like the warmth from within You think you know someone Like you learned to love them 'Cause you think you know someone 'Til you don't Yea you think you know someone 'Til you don't