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.

You can either have software quality or you can have pointer arithmetic, but you cannot have both at the same time.

There are only two things wrong with C++: The initial concept and the implementation.

Incorrect documentation is often worse than no documentation.

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.

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

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.

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.

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

Perfect reusable components are not obtained at the first shot.

The more freedom you get, the less your mind and your body is strangled!

I don't have to experience tragedy to understand it.

Inevitably, every part an actor plays contains some of himself.

It [freedom] is a thing of the spirit. Men must be free to worship, to think, to hold opinions, to speak without fear. They must be free to challenge wrong and oppression with the surety of justice.

The art of genius is knowing how far out is too far.

I think that we live in a moment in time where people have a lot of information about a lot of people kind of instantly, but it's all sort of surface information and it doesn't really mean anything.

Our problem is not the lack of knowing; it is the lack of doing. Most people know far more than they think they do

I shopped at J. Crew in high school, I studied computer science. I was a nerd-nerd, now I'm a music-nerd.

Could your medicine be a cell, not a pill? Could your medicine be an organ that's created outside the body? Could your medicine be an environment?

So few women have any clear idea of the power their ordinary beauty holds over so many of us men.