“When "this isn't right" changes to "this isn't optimal" in your vocabulary, you've moved up the food chain.”

Source: The Housekeeper and the Professor

Source: So You Want to Be a Wizard

Athyra (1993)
Context: It isn't always easy to act on what's in your head instead of what's in your heart. And it isn't always right to. The whole trick to knowing what to do is deciding when to make yourself listen to your head, and when it's okay to just follow your feelings.

Interview https://www.rollingstone.com/music/features/jewel-19981224 with Neil Strauss in Rolling Stone (24 December 1998)
Context: I kept getting typified as this Pollyanna neohippie. I think it's because I have a different definition of optimism. I've noticed a belief that somehow optimism lacks intelligence and that optimism stems from a lack of experience and naiveté. I don't believe that. I believe optimism is a choice. Cynicism isn't smarter, it's just safer.

24 July 2018
2018, DON'T StART YOUTUBE BEFORE WATCHING THIS

Response after reading a colleague's paper, quoted in The Successful Toastmaster: A Treasure Chest of Introductions, Epigrams, Humor, and Quotations (1966) by Herbert Victor Prochnow, p. 350, and in Mathematical Apocrypha Redux : More Stories and Anecdotes of Mathematicians and the Mathematical (2005) by Steven George Krantz, p. 194
This paper is so bad it is not even wrong.
As quoted in Comic Sections : The Book of Mathematical Jokes, Humour, Wit, and Wisdom (1993) by Des MacHale
Das is nicht einmal falsch.
It is not even wrong.
As quoted in Not Even Wrong : The Failure Of String Theory and the Search for Unity in Physical Law (2006) by Peter Woit (2006), Preface, p. xii

Unkempt Thoughts (1957), p. 157