My greatest challenge has been to change the mindset of people. Mindsets play strange tricks on us. We see things the way our minds have instructed our eyes to see.

Let us change our traditional attitude to the construction of programs. Instead of imagining that our main task is to instruct a computer what to do let us concentrate rather on explaining to human beings what we want a computer to do.

Photograph: a picture painted by the sun without instruction in art.

A well-instructed people alone can be permanently a free people.

The great book for you is the book that has the most to say to you at the moment when you are reading. I do not mean the book that is most instructive but the book that feeds your spirit. And that depends on your age your experience your psychological and spiritual need.

Children also have artistic ability and there is wisdom in there having it! The more helpless they are the more instructive are the examples they furnish us and they must be preserved free of corruption from an early age.