“Careful as they may be, developers of Eiffel libraries will always run into cases in which, after releasing a library class, they suddenly experience what in French is called esprit de l’escalier or wit of the staircase: a great thought which unfortunately is an afterthought.”

Perfect reusable components are not obtained at the first shot.

C++ is the only current language making COBOL look good

Constants are widely known for the detestable practice of changing their values; we should prepare ourselves against the consequences of such fickleness

Ask not first what the system does; ask what it does it to!

Software entities (classes, modules, functions, etc.) should be open for extension, but closed for modification.

As Mr. Nagle so competently points out, almost no one uses Eiffel; in fact until recently there were only 9 users. But now a 10th person just started, so we are holding a conference, appropriately titled the TENTH Eiffel USER conference, to celebrate.

The role of a trainer or consultant is to empower the customer, not to make himself indispensable

I have always felt sympathy towards the biologists who accept to debate creationists. Now I also understand them better; one can fight opinions, not articles of faith.

Eiffel borrows quite openly from several earlier programming languages and I am sure that if we had found a good language construct in C we would have used it as well.

I think Smalltalk is inappropriate for serious industrial developments. After all, run time is a little late to find out whether you have a landing gear.

Incorrect documentation is often worse than no documentation.

Writing a class without its contract would be similar to producing an engineering component (electrical circuit, VLSI (Very Large Scale Integration) chip, bridge, engine…) without a spec. No professional engineer would even consider the idea.

Correctness is clearly the prime quality. If a system does not do what it is supposed to do, then everything else about it matters little.

Like a clever reply that would have stunned all the other dinner guests – if only you had thought of it before walking down the stairs after the party is over

My pop is this big, huge man, nothing can hurt him. I went running into his bedroom like, ‘Daddy, Daddy, the boogie man’s under the bed!’ Pop opens one eye, he’s like, ‘Is the boogie man bigger than me?’ ‘

I think when I started acting it was the first time I got the freedom of expression.

I swear my car won’t run unless I’m picking my nose: At least, I’m that superstitious about it, so I don’t want to take any chances.

Bees underline the reality that we are more, not less, dependent on nature’s services in a world of close to seven billion people.

If you take the hard numbers, then science is clearly telling us that we’re running out of time.

If I were you I would face my clothes, to make sure that no one runs off with them!

Though we love to think that we are civilized & developed than that of people lived centuries ago.

When the principles that run against your deepest convictions begin to win the day, then the battle is your calling, and peace has become sin.