Lev Kamensky wrote

“And I've found that all the people who made a big contribution to humanity had one thing in common... they all have conquered their Painful function... 4th function in A model.”

Is this due to the amount of effort that these types of people exerted?
I was watching Donald Trump this morning (I have today off) co-hosting Regis and Kelly. I can see where he dominated his inferior function as a probable ESTp. He shows that he has the ability to socially project (or I would call it the expression of developmental stability) it seems like to me he either rehearsed for the show or he practiced , or most likely both.
Has anyone on this forum dominated their 4th function?