if a person is trying to have their voice heard they have found this truth to be self evident in their own beliefs. this was stated in the declaration and i think they held it close in hopes to have atleast mental room to work on what they want to say in safety, leading to freedom of more then just body.

Yes and no. There is such a guide stemming from the Holmes decision.

Holmes used the example of falsely shouting fire in a crowded theater in articulating the "clear and present danger" test for determining whether expression was protected under the first amendment. The "clear and present" danger test has long since been abandoned.