Declaration of Independence

How do we know that the colonists were God-fearing people?

In the beginning Declaration of Independence the colonists mention God,

 "The unanimous Declaration of the thirteen united States of America, When in the Course of human events, it becomes necessary for one people to dissolve the political bands which have connected them with another, and to assume among the powers of the earth, the separate and equal station to which the Laws of Nature and of Nature's God entitle them"

hope this helps!

b. sec, foreign relations