The text is by Theodor Seuss Geisel (Dr. Seuss), from Oh, the Places You’ll Go!, first published in January 1990, when the famed author was 85 year old. It is a simple, profound wisdom, and my favorite of his works, along with Green Eggs and Ham which is one of the first books I taught myself to read.
There is a whole universe out there, and it has your name on it. Go, get yourself some, and take a camera, some paper, and a pen. You’ll want to write down what it tells you.