Songfacts®:

• Metallica frontman James Hetfield entered rehab for alcoholism during the recording of St. Anger. As such, people often tie that subject matter into every song off the album. You can see that angle in "Dirty Window" if you want to, but the song seems to be more subtle and more universal than that.
  
  "Dirty Window" is about hypocrisy and the distortions of ego. In the song, Hetfield can't see the dirtiness of his own house but is ready to condemn everything that's wrong with the world outside.
• The "dirty window" metaphor is reminiscent of the old saying, "Those who live in glass houses shouldn't throw stones," meaning you shouldn't go around condemning people for things you are guilty of, not only because it's morally wrong and hypocritical but also because you set yourself up for getting your own windows busted.
  
  Or, maybe a better comparison is to the Biblical book of Matthew, section 7:4-5, which reads:
  
  Or how can you say to your neighbor, 'Let me take the speck out of your eye,' while the log is in your own eye? You hypocrite, first take the log out of your own eye, and then you will see clearly to take the speck out of your neighbor's eye.
  
  Whatever the chosen comparison, Hetfield is embodying a hypocrite (possibly himself) to point out the arrogant contradictions in his thinking.
• This is the only Metallica album that doesn't have an official bass player. The band had parted ways with Jason Newsted, whose last performance with the band was on "I Disappear," and didn't feel ready to replace him, so longtime Metallica producer Bob Rock (regular collaborator since 1990) played bass on St. Anger as a one-off deal.
  
  It was only in February 2003, after the album was completed, that Metallica brought in Robert Trujillo to take Newsted's place. Trujillo's first live performance with the band was at San Quentin prison on May 1, 2003.
  
  Rock and Metallica parted ways after St. Anger.