This is an ongoing theme in 'The Little Prince'. I don't view the grown ups though, as adults, and I don't view the children just as kids. I view the children as all people in the world who still have an imagination. Those who hold onto a sense of innocence, and don't lose themselves as they grow up. I view the adults as those who care only about the extrinsic things; about money, appearance, what job you have, etc. So, from this quote, everyone once has had the innocence and imagination of a child, but many forget it and lose sight of this. I have known many teenagers who have already lost it, who appear to already forget what it was like to have that sense of wonder about the world. They stop questioning, they stop wanting to know, they start thinking they know it all. I hope one day they all remember what it was like to be a child again