I used different pencils to draw it. It represents a changed version of the pyramid you can find on every dollar bill.
The meaning of "Novus Opiate Seclorum" is a little bit different, so here's the official explanation from Tool:
The other quote in question is the "Novus Opiate Seclorum" on the back. Here's an insight by Mike `Shmoo' Smuland (firstname.lastname@example.org):
"Novus ordo seclorum" ("a new order of the ages") is the motto on the great seal of the USA. Get it? But opiate is not a generic term for drug:
"Opiate: 1. a drug that contains opium and so dulls pain or brings sleep. 2. anything that quiets: opiates to grief.
"Throw the two together. A new opiate of the ages." Take that in context of the answer to Question E1, and you have your answer.
Dave Sticher (email@example.com) points out that "the eye in the pyramid on the dollar bill is frequently associated with the Illuminati, the legendary group who supposedly rules the world through various nefarious means" -- this may be a Toolish connection as well.
E1: The accepted notion follows: It relates to Marx's statement that "religion is the opiate of the masses." People relied on the church for direction in their lives, and carried on with their lives. Marx felt that the church kept people from "waking up and smelling the coffee." This is one of the themes of the CD: the band makes fun of the way people let others think for them. That is, it's one thing to have religious beliefs, but it's another thing to let someone else interpret those beliefs and force them on you.