“My personal opinion of Mach is not very high. Frankly, it's a piece of crap. It contains all the design mistakes you can make, and even managed to make up a few of its own.”
2000s, (2001)
Help us to complete the source, original and additional information
Linus Torvalds 150
Finnish-American software engineer and hacker 1969Related quotes
“Do you ever make silly mistakes? It is one of my very few creative activities.”

As quoted by Edward Teller, in Dr. Edward Teller's Magnificent Obsession by Robert Coughlan, in LIFE magazine (6 September 1954), p. 62 http://books.google.de/books?id=I1QEAAAAMBAJ&pg=PA62
As quoted by Edward Teller (10 October 1972), and A Dictionary of Scientific Quotations (1991) by Alan L. Mackay, p. 35
Variant: An expert is a man who has made all the mistakes which can be made in a very narrow field.

“Make bold choices and make mistakes. It's all those things that add up to the person you become.”

Akio Morita, cited in: Nick Lyons (1976) The Sony vision. p. 101.

“You notice a very special person, when he can make even you the same.”
Original: Ti accorgi di una persona veramente speciale, quando riesce a rendere tale anche te.
Source: prevale.net

Part 5: "The World of One Physicist", "The 7 Percent Solution", p. 255
Surely You're Joking, Mr. Feynman! (1985)