“The things I can't do are the things I have yet to learn.”
“The things I don't are the things I have yet to learn.”
“I can't die yet, doctor. Not yet. I have things to do. Afterwords I'll have a whole lifetime in which to die.”
“The one thing I have learned is that you can't think your way through life. The only way to figure out what to do is to do - something.”
“You're the one thing I want the most in the world yet the one thing I cannot have. Because to have you completely would be impossible. You can't go where I walk.”
“One thing I have learned in a long life: that all our science, measured against reality, is primitive and childlike -- and yet it is the most precious thing we have.”