God will not judge anyone for failing to perform a duty if the person had no access to the knowledge of that duty. But even without the Bible, all people have access to the knowledge that we are created by God and therefore depend on Him for everything, thus owing Him the gratitude and trust of our hearts. Deep within us we all know that it is our duty to glorify our Maker by thanking Him for all we have, trusting Him for all we need, and obeying all His revealed will.