When you explain to people what you're trying to do, as opposed to just making demands or delegating tasks, you can build instant trust, even if it's just for that short time you're on the phone.

  In the book Simon Sinek speaks of golden circle is based on golden ratio. He lives in New York and teaches a graduate-level class in strategic communications at Columbia University. Books
Sinek Simon (2009).

com. His 2009 book on the same subject Start With Why: How Great Leaders Inspire Everyone to Take Action (2009) delves into what he says is a naturally occurring pattern grounded in the biology of human decision-making that explains why we are inspired by some people leaders messages and organizations over others.