Ivey still likes to recall one formative moment when he sat watching Dweck in action.

Another formative moment came last summer, by which time Dweck had become an entertainment lawyer and Ivey a comedian.

Yorke described hearing the phrase for the first time as a "formative moment" for the album, saying it "threw a switch in my head".

"Other campaigns have the luxury of having their formative moments in private," she observed.

Foster, born in 1826, came along at "a formative moment of popular culture," as one historian puts it.

Real formative moments are hard to manufacture.

The country is in a tumultuous and formative but also vulnerable moment in its history, which Zawahiri will seek to exploit.

And just as amazingly, there are almost no films or still photographs recording the formative moments in George W. Bush's early life.

It was a formative moment: the tide seemed to have turned; secular Zionism had been forced to submit to the divine will.

However, the authors themselves skip many important points leading up to the intifada and its formative moments.