A good phrase to include on a graduation announcement is American author and philosopher Henry David Thoreau's "Go confidently in the direction of your dreams in the life you've imagined." Another good phrase is American poet Ralph Waldo Emerson's, "Do not follow where the path may lead. Go, instead, where there is no path and leave a trail," according to Tiny Prints.
American novelist John Updike offers an encouraging quote with "You can not help but learn more as you take the world into your hands. Take it up reverently, for it is an old piece of clay with millions of thumbprints on it."
A graduation announcement phrase that appeals to the child in everyone is Dr. Seuss's "Congratulations! Today is your day. You're off to Great Places! You're off and away! You have brains in your head. You have feet in your shoes. You can steer yourself in any direction you choose. You're on your own. And you know what you know. You are the guy who'll decide where to go."
A funny quote to include on a graduation announcement would be American satirist Jon Stewart's "The unfortunate, yet truly exciting thing about your life, is that there is no core curriculum. The entire place is an elective," notes Tiny Prints.