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

Prot:
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.

Prot:
Even your Buddha and your Christ had quite a different vision. But nobody's paid much attention to them, not even your Buddhists and your Christians.

Prot:
I shall miss Earth, it has great potential.

Prot:
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.

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

Prot:
Now if you'll excuse me, I have a beam of light to catch.

Prot:
I wanna tell you something Mark, something you do not yet know, that we K-PAXians have been around long enough to have discovered. The universe will expand, then it will collapse back on itself, then will expand again. It will repeat this process forever. What you don't you know is that when the universe expands again, everything will be as it is now. Whatever mistakes you make this time around, you will live through on your next pass. Every mistake you make, you will live through again, & again, forever. So my advice to you is to get it right this time around. Because this time is all you have.

Dr. Mark Powell:
What would you say if I told you I think you're as human as I am?

Prot:
I would say you're in need of a thorazine drip, Doctor.

Dr. Mark Powell:
Do you know why you're here?

Prot:
You think I'm crazy.

Dr. Mark Powell:
Do you think you're crazy?

Prot:
A little homesick, perhaps.

Dr. Mark Powell:
And where is home?

Prot:
K-PAX.

Dr. Mark Powell:
K-PAX?

Prot:
It's a planet about 2,000 of your 'light-years' away.

Dr. Mark Powell:
I see.

Prot:
Your planet is really bright.

Prot:
Your produce alone has been worth the trip.

Prot:
Don't worry, I'm not going to burst through your chest.

Prot:
Doctor. Doctor. Doctor. Doctor. How many doctors are there on this planet?

Prot:
Don't get me wrong, Mark. You've been very hospitable.

Prot:
Hospital. Hospitable.

Prot:
Do I smell apple pie?

Prot:
I travel light.

Dr. Mark Powell:
What if I were to tell you that according to a man who lived on our planet, named Einstein, that nothing can travel faster than the speed of light?

Prot:
I would say that you misread Einstein, Dr. Powell. May I call you Mark? You see Mark, 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.

Dr. Mark Powell:
I'm only familiar with nine planets.

Prot:
Actually there are ten. But that doesn't matter, I'm not from your solar system.

Howie:
You never gave me my third task. What's my third task?

Prot:
To stay here, and be prepared for anything.

Prot:
Doctor... patient... curious distinction.