“We are all different — but we share the same human spirit. Perhaps it's human nature that we adapt — and survive.”

“Black holes ain't as black as they are painted. They are not the eternal prisons they were once thought. Things can get out of a black hole, both to the outside, and possibly to another universe. So if you feel you are in a black hole, don't give up. There's a way out.”

“I have lived with the prospect of an early death for the last 49 years. I'm not afraid of death, but I'm in no hurry to die.”

“So next time someone complains that you have made a mistake, tell him that may be a good thing. Because without imperfection, neither you nor I would exist.”

“There is a fundamental difference between religion, which is based on authority and science, which is based on observation and reason. Science will win, because it works.”

“The victim should have the right to end his life, if he wants. But I think it would be a great mistake. However bad life may seem, there is always something you can do, and succeed at. While there's life, there is hope.”

“Our new Constitution is now established, and has an appearance that promises permanency; but in this world nothing can be said to be certain, except death and taxes.”

“When in doubt, tell the truth.”

“The old believe everything; the middle-aged suspect everything; the young know everything.”

“Men marry because they are tired; women because they are curious. Both are disappointed.”

“Oh, Diamond! Diamond! thou little knowest what mischief thou hast done!”

“Do not worry about your difficulties in Mathematics. I can assure you mine are still greater.”