Self-confidence, what is it and how do we get it?

Today we talked in-depth about self-confidence with David Sill. Mr.
Sill is a former Sr. Vice President of sales with an online
tech-support company in the Philadelphia area. Topics discussed
related to self-confidence were: 1. How do we get it? 2. How do we
teach it and nurture it in our children? 3. How does it translate
into working in business? Sales. 4. How important is failure to the
process? 5. How do you get it back when you have lost it?