At that point I realized that I had been thinking in Russian. It’s a wonderful language for paranoid thoughts. - Robert A. Heinlein

“If there was anything, anything more at all, after this crazy mix-up we call living, I could feel that there might be some point to the whole frantic business, even if I did not know and could not know the full answer while I was alive.”
“And suppose there was not? Suppose that when a man’s body disintegrates, he himself disappears absolutely. I’m bound to say I find it a probable hypothesis.”
“Well— It wouldn’t be cheerful knowledge, but it would be better than not knowing. You could plan your life rationally, at least. A man might even be able to get a certain amount of satisfaction in planning things better for the future, after he’s gone. A vicarious pleasure in the anticipation.”

Everything is theoretically impossible, until it is done. One could write a history of science in reverse by assembling the solemn pronouncements of highest authority about what could not be done and could never happen.

I learned before you were born that when someone wants to see me in a hurry, the urgency is almost never mutual.