Your view point or your perspective towards a particular thing completely changes in flash of a time. That’s Paradigm shift.
Covey has the best example of a paradigm shift: he was traveling in a subway, a man gets in with his two sons, the sons are running all over the place bothering the people, this continues, so he finally gets irritated enough to ask the father why he doesn’t do something to control his kids. The father replies, “We just got back from the hospital where their mother died. I don’t know how to handle it and I guess they don’t either.”
Suddenly you see the everything differently. That is the power of a paradigm shift. They are the same kids yelling and screaming in the subway, but you look at them and understand them in a different way.