The physics are simple in theory, but in practice they are filled with the possibility for limitless error.

I'm tired of being responsible for 203 lives, and I'm tired of deciding which mission is too risky and which isn't, and who's going on the landing party and who doesn't... and who lives, and who dies.

I wanted you to thank you for being my friend and letting me play a part in your story.

Don't simply knock and wait for the door to be opened. Go look for the keys. Some fit the lock better than others.

I can only give you some hints. You have to place him in a situation where your advantages are magnified.

Mortals have always exaggerated the difference between hate and love. Both come from the heart. You can never hate strongly unless you have loved strongly.

I went to work at the library. I know that sounds crazy but I didn't know where else to go. Besides, at the library I was constantly surrounded by people. And I loved my job, surrounded by so many books, so many lives, so much of the past.