Beware of finding what you're looking for. [<i>A favorite aphorism he often used</i>.] - Richard Hamming

It is not easy to become an educated person.

Statistics should be taught early so that the concepts are absorbed by the student's flexible, adaptable mind before it is too late.

This is a book about thinking. One cannot talk about thinking in the abstract, at least not usefully. But one can talk about thinking about digital filters, and by studying how great scientists thought about digital filters, one learns, however gradually, to think like a great scientist.