There is a time and a place for everything, and valedictories--farewells--are a particular type of ceremonial rhetoric and follow certain conventions. There's even a Wiki-How entry: How to Write a Valedictorian Speech: 8 Steps - wikiHow
See #3, which discusses aiming at inclusiveness/representation of the class itself.
I love the NSA. It's like having a secret fan-base you will never see, but they're there, watching everything you write and it makes me feel all warm and fuzzy inside knowing that I may be some person's only form of unconstitutional entertainment one night.
Well, maybe in little Belton it is.
"Give me your tired, your poor, your huddled masses yearning to breathe free."
"When we live authentically we create an opportunity for others to walk out of their dark prisons of pretend into freedom."