"IGNORANTIA JURIS NON EXCUSAT"

"Ignorantia juris non excusat" is a latin word meaning ignorance of the law excuses no one. Plato has this to say: "What’s right is right and what’s wrong is wrong. And isn’t this believed by everyone ... even among the Persians, and always? ... What is fine, no doubt, is everywhere legislated as fine, and what is shameful as shameful; but not the shameful as fine or the fine as shameful."

     This legal principle imputes a presumption of law, meaning knowledge of all laws to all persons within a jurisdiction. Not to worry, Lawyers are wonderful people who have dedicated their lives to keep knowing laws, while staying abreast of new reviews; that is why they are LEARNED, be sure to have a trusted lawyer to save you from avoidable liabilities.
     Further, with God, Christ is the end of the law. It stands to reason that "IGNORANTIA CHRIST NON EXCUSAT", meaning ignorance of Christ will excuse no one, since the bible says the gospel of the kingdom will be preached in the whole world, and then the end will come.

Reference:
Wikipedia.
Romans 10:4
Matthew 24:14.