March 2, 2014, marks Dr. Seuss’ 110th birthday! The famous children’s author, whose real name was Theodor Geisel, was born in 1904, and more than 20 years after his passing, his stories are still entertaining and teaching millions of children through his unforgettable characters and quotable rhymes.

Here’s a quick fun fact about the writer: His middle name was Seuss and he wasn’t a medical doctor. “Dr. Seuss” was just a pen name. reported the author wrote “Green Eggs and Ham” on a dare. His publishers dared him that he couldn’t write a book using only 50 different words.

To celebrate Dr. Seuss’ birthday, we’ve provided some of his most beloved quotes below, courtesy of Parade:

1. “With your head full of brains and your shoes full of feet, you’re too smart to go down any not-so-good street.”

2. “Today is your day! Your mountain is waiting so get on your way!”

3. “You’re on your own. And you know what you know. And you’re the one who’ll decide where to go.”

4. “Oh the things you can find if you don’t stay behind!”

5. “Sometimes the questions are complicated and the answers are simple.”

6. “Today you are you, that is truer than true. There is no one alive who is youer than you.”

7. “You have brains in your head, you have feet in your shoes. You can steer yourself any direction you choose.”

8. “If you never did you should. These things are fun, and fun is good.”

9. “If things start happening, don’t worry. Don’t stew. Just go right along. You’ll start happening too.”

10. “The more that you read, the more things you will know. The more that you learn, the more places you’ll go.”

11. “A person’s a person, no matter how small.”

12. “I have heard there are troubles of more than one kind. Some come from ahead and some come from behind. But I’ve bought a big bat. I’m all ready you see. Now my troubles are going to have troubles with me!”

13. “So be sure when you step. Step with care and great tact and remember that life’s a Great Balancing Act.”

14. “Oh, the things you can find if you don’t stay behind!”

15. “Will you succeed? Yes! You will, indeed! (98 and ¾ percent guaranteed.)”

16. “Today was good. Today was fun. Tomorrow is another one.”

17. “You’re on your own. And you know what you know. And you are the guy who’ll decide where to go.”

18. “Unless someone like you cares a whole awful lot, nothing is going to get better. It’s not.”

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