It was gratifying to see my colleagues asking probing questions and demonstrating genuine concern about this important issue as well.
You should always check references, ask probing questions, search out answers, and find ways to learn more about what you're being told. This is a catch all but it is important.
He was a constant source of inspiration: When I introduced him to my family and friends, he asked authentic, probing questions and found out more about them in minutes than I had in years.