I've Never Been A Good Estimator Of

The Enjoyment Of One's Tools Is An Essential Ingredient Of Successful Work.

...one Of The Most Important Lessons, Perhaps, Is The Fact That Software Is Hard. From Now On I Shall Have Significantly Greater Respect For Every Successful Software Tool That I Encounter. During The Past Decade I Was Surprised To Learn That The Writing Of Programs For Tex And Metafont Proved To Be Much More Difficult Than All The Other Things I Had Done (like Proving Theorems Or Writing Books). The Creation Of Good Software Demand A Significiantly Higher Standard Of Accuracy Than Those Other Things Do, And It Requires A Longer Attention Span Than Other Intellectual Tasks.

We Should Continually Be Striving To Transform Every Art Into A Science: In The Process, We Advance The Art.

The Designer Of A New Kind Of System Must Participate Fully In The Implementation.

[the Euclidean Algorithm Is] The Granddaddy Of All Algorithms, Because It Is The Oldest Nontrivial Algorithm That Has Survived To The Present Day.