Often seen on the Internet and elsewhere: To find God in the Constitution, all one has to do is read it, and see how often the Framers used the words "God," or "Creator," "Jesus," or "Lord."
Except for one instance, however, none of these words appears in the Constitution. The exception is the Signatory, where the date is written as follows:
"Seventeenth Day of September in the Year of our Lord one thousand seven hundred and Eighty seven."
The use of the word "Lord" here is not a religious reference, however. This was a common way of expressing the date, in both religious and secular contexts. The lack of any these "religious" words does not mean that the Framers were not spiritual people, any more than the use of the word Lord means that they were.
What this absence of these words does show is not a love for or disdain of religion, but the feeling that the new government should not involve itself in matters of religion. In fact, the original Constitution barred any religious test to hold any federal office in the United States.