I remember seeing the 8 laws and 8 codes ( or some such name) for The Machine Cult in one of the DH books, does any one know which book they are in?

The Mysteries.
01. Life is directed motion.
02. The spirit is the spark of life.
03. Sentience is the ability to learn the value of knowledge.
04. Intellect is the understanding of knowledge.
05. Sentience is the basest form of Intellect.
06. Understanding is the True Path to Comprehension.
07. Comprehension is the key to all things.
08. The Omnissiah knows all, comprehends all.

The Warnings:
09. The alien mechanism is a perversion of the true path.
10. The soul is the conscience of sentience.
11. A soul can be bestowed only by the Omnissiah.
12. The Soulless sentience is the enemy of all.
13. The knowledge of the ancients stands beyond question.
14. The machine spirit guards the knowledge of the ancients.
15. Flesh is fallible, but ritual honours the machine spirit.
16. To break with ritual is to break with faith.

Thanks Snidesworth,

That's what I was looking for I think. Where did they come from?

I have no idea, I'm afraid. I copied them to a txt file a while back from somewhere and Google searches reveal no citations of the original source.

The origins of them lie in an old Inquisitor article on the Adeptus Mechanicus by Gav Thorpe, if memory serves. I forget the name.