The last sentence of the Declaration of Independence before the space allotted for signatures reads, “…for the support of this Declaration, with a firm Reliance on the Protections of divine Providence, we mutually pledge to each other our Lives, our Fortunes, and our sacred Honor”. Indeed, July Fourth for the founders was a serious and somber occasion.
https://thefederalist.com/2023/07/03/celebrating-july-fourth-rings-hollow-without-fidelity-to-americas-founding-ideals/