Collecting these here, to use perhaps in CodeCurious newsletter:

"The most effective debugging tool is still careful thought, coupled with judiciously placed print statements." — Brian W. Kernighan

“Be curious. Read widely. Try new things. I think a lot of what people call intelligence boils down to curiosity.” - Aaron Swartz

"Computers are good at following instructions, but not at reading your mind." — Donald Knuth

"To me programming is more than an important practical art. It is also a gigantic undertaking in the foundations of knowledge." - Grace Hopper

"Every great developer you know got there by solving problems they were unqualified to solve until they actually did it." - Patrick McKenzie

"One of the best programming skills you can have is knowing when to walk away for awhile.” - Oscar Godson

"Telling a programmer there's already a library to do X is like telling a songwriter there's already a song about love.” - Pete Cordell

"The digital revolution is far more significant than the invention of writing or even of printing." – Douglas Engelbart

"Software being 'Done' is like lawn being 'Mowed'." - Jim Benson

"What one programmer can do in one month, two programmers can do in two months." - Fred Brooks

"If it doesn’t work, it doesn’t matter how fast it doesn’t work." - Mich Ravera

"The amount of sleep that you get has a larger impact on your effectiveness than the programming language you use." – Wesley Aptekar-Cassels

"An evolving system increases its complexity unless work is done to reduce it." - Meir Lehman

"It turns out that style matters in programming for the same reason that it matters in writing. It makes for better reading." - Douglas Crockford

"A good programmer is someone who always looks both ways before crossing a one-way street." — Doug Linder

“The best way to predict the future is to implement it.”– David Heinemeier Hansson

"The value of a prototype is in the education it gives you, not in the code itself." - Alan Cooper

"Everyone knows that debugging is twice as hard as writing a program in the first place. So if you're as clever as you can be when you write it, how will you ever debug it?" – Brian Kernighan

"Testing can show the presence of errors, but not their absence." - Edsger W. Dijkstra

"Programming isn’t about what you know; it’s about what you can figure out.” - Chris Pine

"No one in the brief history of computing has ever written a piece of perfect software. It's unlikely that you'll be the first." - Andy Hunt

"Weeks of coding can save you hours of planning." - Unknown

"The best way to get accurate information [..] is to post something wrong and wait for corrections." – Matthew Austern

"Those hours of practice, and failure, are a necessary part of the learning process."- Gina Sipley