The whole scene was quiet, so normal, she felt foolish to be talking of vampires and kidnapped babies. (Prologue)

Believe me, I know. I have two boys, I’m an expert. The smallest dinosaurs were under a foot. Teenysaurus or something, I don’t know. Those names are impossible. You’ll never learn those names if you’re over the age of ten. (First Iteration)

The history of evolution is that life escapes all barriers. Life breaks free. Life expands to new territories. Painfully, perhaps even dangerously. But life finds a way.
-- Ian Malcolm (Third Iteration)

Importance: The theme is often reinforced by Dr. Malcom's rather ascerbic remarks about Hammond's commerialization of nature and genetics.

Now you see the flaw in your procedures. You only tracked the expected number of dinosaurs. You were worried about losing animals, and your procedures were designed to advise you instantly if you had less than the expected number. But that wasn’t... (Third Iteration)