"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 infin…"

"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 l…"

"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…"

"Doctor. Patient. Interesting human distinction."

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