The very lengthy letter "Where Nobility Comes From" attempted to answer "if all people are not created equal by God, then where do such noble ideas come from?"
The noble idea of all people are created equal came from rational thinking from very rational thinking people. Of course this idea was not stated in the Bible but a man made document. All men are created equal was also written before the writings of Charles Darwin about his theory of evolution.
The letter ends with a call for a revival of the Christian religion and to have a Constitutional Amendment by Pennsylvania so that God can be taught as the Creator.
If the Founding Fathers truly thought that the God of the Christian religion was the Creator to be taught then there would be no need for an amendment.
Freedom, liberty, equality and ingenuity is what makes this nation great. A revival of the Christian religion will not achieve the greatness you believe to be lost, it would be rational thinking.