Freedom of speech is a principal that advocates the freedom of a person to state his/her opinion freely and to impart information and ideas without any restrictions.
However, in the case of Schenk v. United States, the Supreme Court ruled that the Constitution does not protect a person when "falsely shouting fire in a theater and causing panic" because freedom of speech does not protect speech that has the potential to incite danger and disharmony in the society.
Therefore, in the case of Schenk v. United States, freedom of speech of First Amendment was limited.
As one's peesonality ages so do their experiences also do so. Imagine if you were a child and were extremely happy. Then imagine years later when you are no longer happy. What caused that... it was an experience.