It is always more than you could imagine out there

I am reading the book – Creative Confidence.  I got quite a lot of citations which are inspiring

• No matter how high you rise in your career, no matter how much expertise you gain, you still need to keep your knowledge and your insights refreshed.  Otherwise, you may develop a false confidence in what you already “know” that might lead you to the wrong decision.  Informed intuition is useful only if it is base on information that’s accurate and up to date.
• Mark Twain said a century ago, “It’s not what you don’t know that gets you into trouble, it’s what you know for sure that ain’t so.” Don’t be fooled by what you “know for sure” about your customer, yourself, your business, or the world. Seek out opportunities to observe and update your worldview.
• Empathy means challenging your preconceived ideas and setting aside your sense of what you think is true in order to learn what actually is true

Actually, they are telling 1 common thing.  What we know in the past may not hold true now or future.  But why?  Is there any theoretical grounds in principles?  I recall that when I read a book of anthropology, I learn the terms structuralism.  I learn the following:

• Elements of human culture must be understood in terms of their relationship to a larger, overarching system or structure
• It works to uncover the structure that underlie all the things that human do, think, perceive, and feel.
• It is “the belief that phenomena of human life are not intelligible except through their interrelations.
• These relations constitute a structure, and behind local variations in the surface phenomena there are constant laws of abstract culture.

The interrelations are dependent on the various kinds of factors and combination/permutation.  But how much and how depth you understand?  It looks that we, human, always overlook something and over time, we uncover missing factors and combination as well – a new update as a result.  Why does lean manufacturing emphasize kaizen?  Why is the Japanese requesting different people to look at the same production process to find room for improvement.  It is because different people with different thinking power can use a different perspective to uncover the missing factors.  Right?