He has always said, you've got to be able to walk, and it's tougher than you might think.
Back in 2015 after he came down the escalator {with the beautiful Melania} I bought another copy and re-read it.
The second reading was better than the first.
It was selling for $7 on Amazon in paperback in 2015, I don't know the price today, but it is a good read.
I read it 30 years ago because I was in systems sales
Similar story.
I gleaned MUCH, from this book. I attribute many of my successes, to this book.