Scratches and incisions painted on the surface recall the hieroglyphs of ancient tablets. (phillips.kimbellart.org)
We are supposed to BE the «Scripture» or «Word of God» but here we are 2000 years later trying to decipher ancient tablets. (redeeminggod.com)
If you do enough side missions to increase your XP regularly and find ancient tablets in pyramids and hidden tombs, which rewards one ability for each tablet you find, near the end of the game you should have most of your skill tree filled out. (gamecrate.com)