Tool - Sweat Lyrics Meaning

I agree with the deja-vu ideas to a point. My take is that he's in a cycle that he can't break free of. After he gets to the end of the cycle, and begins it again, he's forgotten that it's not the first time. That's why it seems like he's been here before. It brings him home because he's used to it, and it makes him feel good about being in the situation. Probably about his addictions, like many of the songs from Tool and APC, which can be applied to ANY addiction that any one of us have. Alcohol comes to mind. You go to work, you come home, and you drink. You go to work, you come home, and you drink. After a long enough time, you no longer recall HOW you came to be where you are, it makes you dizzy to try, but you just know that it makes you better, and ready to start all over again.