I have arrived. My travels are over for the time being.

I didn't arrive by train.

I'm an alien. Don't worry, I'm not going to leap out of your chest.

What Einstein actually said was that nothing can accelerate to the speed of light because its mass would become infinite. Einstein said nothing about entities already traveling at the speed of light or faster.

You know, for an educated person Mark, you repeat things quite a bit. Are you aware of that?

Why is a soap bubble round? Because it is the most energy efficient configuration. Similarly, on your planet I look like you; on K-PAX I look like a K-Paxian.

Your produce alone has been worth the trip.

Every being in the universe knows right from wrong, Mark.

Let me tell you something, Mark. You humans, most of you, subscribe to this policy of an eye for an eye, a life for a life, which is known throughout the universe for its… stupidity. Even your Gautama Buddha|Buddha and your Jesus|Christ had quite a different vision; but nobody's paid much attention to them, not even the Buddhists or the Christians.

Doctor. Patient. Interesting distinction.