I think that every enduring story that has expressions over multiple periods, that role of being the keeper of the integrity of the vision is a very important role.

There are countless times where you're trying to channel somebody who's not there, but that's what you have to do. But Audrey Geisel, who has executive produced this film and Horton, and who works remarkably close with me, is a great source of information. (The Simpsons creator) Matt Groening once told me that one of the most important roles that he fulfills on The Simpsons is being the keeper of the integrity of the original vision.

No matter what happens with technology or whether you're in traditional animation or stop-motion or CG, the biggest challenge always is story. The flow of making the movie is usually determined by how your story is coming together, and when your story is straining and you can't quite get your hands around it, your entire production is straining.

Why did Ted Geisel end up writing and illustrating for young minds? He has specific imagery in the book, and we never would have moved beyond the discussion phase, if we couldn't have found an expression for The Lorax, dimensionally, that was true to the soul of what comes through in his simple line drawings, on the page.

Songs give you incredible opportunity to convey a tremendous amount in a relatively short period of time. The first thing that John Powell, our composer, says is, "Is the song engaging you to tap your toe?" If you're not tapping your toe, it doesn't matter what you're doing in the song, it's not going to work. But, if you can get the audience to be engaged by the song, then it gives you the opportunity to accomplish so much, in a very concise way.

It's not fair to use movies that weren't creatively successful as a reason why something won't work.

I think that every enduring story that has expressions over multiple periods, that role of being the keeper of the integrity of the vision is a very important role.