The "I'm sorry I let/bring you down" lyrics seem to imply that the narrator feels inadequate or worthless. Perhaps I'm overanalyzing here, the mentions of "my left brain" (considered the more logical brain half) and "the tin man" (who, in the wizard of Oz, didn't have a heart) seem to reference a logical, emotionless outlook - perhaps the narrator thought he would be better off remaining logical rather than focusing on his feelings of low-self esteem. In the chorus - "your time will come if you wait for it... it's hard, believe me, I've tried" - he reveals that even someone with a low sense of self-worth like him will eventually have a time when their life gets better, even if it's hard to wait for that time.
The "I'm sorry I let/bring you down" lyrics seem to imply that the narrator feels inadequate or worthless. Perhaps I'm overanalyzing here, the mentions of "my left brain" (considered the more logical brain half) and "the tin man" (who, in the wizard of Oz, didn't have a heart) seem to reference a logical, emotionless outlook - perhaps the narrator thought he would be better off remaining logical rather than focusing on his feelings of low-self esteem. In the chorus - "your time will come if you wait for it... it's hard, believe me, I've tried" - he reveals that even someone with a low sense of self-worth like him will eventually have a time when their life gets better, even if it's hard to wait for that time.