Tuesday marks the 117th birth anniversary of popular children's author Dr. Seuss. Some of his most popular works include "The Cat in the Hat," "Green Eggs and Ham" and "Horton Hears a Who!"

Dr. Seuss was born on March 2, 1904, in Massachusetts as Theodor Seuss Geisel. 

During his career, Dr. Seuss has published over 60 books that were adapted into TV specials, films and a Broadway musical. Apart from being an author, Dr. Seuss was also an illustrator, animator and political cartoonist.

Seuss died of cancer on Sept. 24, 1991, at his residence in La Jolla, California. 

Here are some of his inspirational quotes by the author, courtesy Keep Inspiring.

1. “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!”

2. “You have brains in your head. You have feet in your shoes. You can steer yourself any direction you choose. You're on your own. And you know what you know. And you're the one who'll decide where to go."

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

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

5. “You're never too old, too wacky, too wild, to pick up a book and read to a child.”

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

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

8. "Think left and think right and think low and think high. Oh the thinks you can think up if only you try."

9. "I like nonsense, it wakes up the brain cells. Fantasy is a necessary ingredient in living."

10. "If you keep your eyes open enough, oh, the stuff you will learn! The most wonderful stuff."

Dr. Seuss A portrait of Dr. Seuss (Theodore Seuss Geisel) is seen during a press preview of an interactive exhibition dedicated to Dr. Seuss at the Children's Museum of Manhattan, New York City, July 6, 2004. Photo: Mario Tama/Getty Images