We don't have to ... the words they wrote have a plain meaning.
our founders believed that God was involved in the founding and nurturing of the nation, and that the practise of rather broadly agreed upon morality and religious dictates by the majority of the population would keep licentious factionalism in check!
But they did not believe that government could make people moral. And they were right not to believe it.
But they relied on the morality of the people to keep the Republic together! Don't you get it...?
What do you think Ben Franklins great quotation meant when he stated to on lookers ..."We have given you a republic...if you can can keep it!"