I'm usually a terrible speaker, but when I was running a startup I really believed in, I made great presentations and was very extroverted. Find a purpose and the rest takes care of itself.
That is also valuable, but a different premise! Barbara Sher originally wrote books based on that premise: find Your Thing and you'll shine -- but discovered that some people didn't seem to have A Thing, and any talk of having A Thing made them stressed and unhappy.
The Barbara Sher book for people who want to find and follow Their Purpose is "I Could Do Anything If I Only Knew What It Was".
"Refuse to Choose" is for people who want to do 70 things but the thought of doing any one of them exclusively is horrifying.
I'm usually a terrible speaker, but when I was running a startup I really believed in, I made great presentations and was very extroverted. Find a purpose and the rest takes care of itself.