whereas, up to the present, there is only one known way of getting born, there are endless ways of getting killed.

Plain lies are dangerous.

The only ethical principle which has made science possible is that the truth shall be told all the time. If we do not penalize false statements made in error, we open up the way for false statements by intention. And a false statement of fact, made deliberately, is the most serious crime a scientist can commit.

Very dangerous things, theories.

It's disquieting to reflect that one's dreams never symbolize one's real wishes, but always something Much Worse... If I really wanted to be passionately embraced by Peter, I should dream of dentists or gardening. I wonder what unspeakable depths of awfulness can only be expressed by the polite symbol of Peter's embraces?

Nothing is more vulgar than a careful avoidance of beginning a letter with the first person singular.

make no mistake about it, the detective-story is part of the literature of escape, and not of expression.