1. "The more that you read, the more things you will know. The more that you learn, the more places you'll go."
    - I Can Read With My Eyes Shut! (1978)
  2. "You'll miss the best things if you keep your eyes shut."
    - I Can Read With My Eyes Shut! (1978)
  3. "Don't give up! I believe in you all! A person’s a person, no matter how small!"
    - Horton Hears a Who (1954)
  4. But now," says the Once-ler, "now that you're here, the word of the Lorax seems perfectly clear. UNLESS someone like you cares a whole awful lot, nothing is going to get better. It's not."
    - The Lorax (1971)
  5. "You're off to Great Places! Today is your day! Your mountain is waiting, So... get on your way!"
    - Oh, The Places You'll Go (1990)
  6. "You'll get mixed up, of course, as you already know. You'll get mixed up with many strange birds as you go. So be sure when you step. Step with care and great tact and remember that Life's a Great Balancing Act. Just never forget to be dexterous and deft. And never mix up your right foot with your left."
    - Oh, The Places You'll Go (1990)
  7. "From there to here, from here to there, funny things are everywhere!"
    - One Fish, Two Fish, Red Fish, Blue Fish (1960)
  8. "All alone! Whether you like it or not, Alone will be something you'll be quite a lot."
    - Oh, The Places You'll Go (1990)
  9. From 1957's How The Grinch Stole Christmas:
    "And the Grinch, with his Grinch-feet ice cold in the snow, stood puzzling and puzzling, how could it be so? It came without ribbons. It came without tags. It came without packages, boxes or bags. And he puzzled and puzzled 'till his puzzler was sore. Then the Grinch thought of something he hadn't before. What if Christmas, he thought, doesn't come from a store. What if Christmas, perhaps, means a little bit more."
  10. "I'm afraid that some times you'll play lonely games too. Games you can't win 'cause you'll play against you."
    -Oh, The Places You'll Go (1990)
  11. "Today you are you! That is truer than true! There is no one alive who is you-er than you! Shout loud, “I am lucky to be what I am! Thank goodness I’m not a clam or a ham Or a dusty old jar of sour gooseberry jam! I am what I am! That’s a great thing to be!”
    -Happy Birthday to You! (1959)
  12. "I am the Lorax. I speak for the trees. I speak for the trees for the trees have no tongues."
    - The Lorax (1971)
  13. "It is fun to have fun. But you have to know how."
    - The Cat in The Hat (1957)
  14. "I know, up on top you are seeing great sights, but down here at the bottom we, too, should have rights."
    - Yertle the Turtle and Other Stories (1958)
  15. "Today is gone. Today was fun. Tomorrow is another one."
    - One Fish, Two Fish, Red Fish, Blue Fish (1960)
  16. "Think left and think right and think low and think high. Oh the thinks you can think up if only you try!"
    - Oh, the Thinks You Can Think! (1975)
  17. "And will you succeed? Yes! You will, indeed! (98 and 3/4 percent guaranteed). KID, YOU'LL MOVE MOUNTAINS."
    - Oh, The Places You'll Go! (1990)
  18. "Nonsense wakes up the brain cells. And it helps develop a sense of humor, which is awfully important in this day and age. Humor has a tremendous place in this sordid world. It's more than just a matter of laughing. If you can see things out of whack, then you can see how things can be in whack."
    - from a 1983 interview with Miles Corwin (I know it's not a quote from one of his books, but it's still one of my favorite quotes ever.)