@halivie,
Halivie - I looked up your link, which btw is
http://www.frontiernet.net/~antiquity/
and noticed it's in Greek, which I read, and that additionally you're offering similar texts in Hebrew, which another person here can read. George is a very sound Latinist, so I'd never argue with him on translations of your texts, but knowing the purpose and spirit of the logo you're looking to create helps.
To sum up: subject to George's expert opinion, I would drop the "sacra" altogether and stick with the 3 words, "ecce scriptura nostra".
"Look at our inscription" (aka "behold our scripture")
sounds good to me as a logo - brevity is an asset, plus this one covers Latin, Greek, plus whatever else you can do inscriptions in, which may not necessarily be religious.