Assuming you rise to the top, please remember: what made you great may not be appropriate for the next generation. - Richard Hamming

Science and mathematics... have added little to our understanding of such things as Truth, Beauty, and Justice. There may be definite limits to the applicability of the scientific method.

What you learn from others you can use to follow.
What you learn for yourself you can use to lead.

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.