This weekend I had the pleasure to receive a guest due to professional duties. Without going into details, a number of events led me to had, many years ago, a rather bad opinion about this guest. Fortunately time went by, I got information from many other sources, and my initial opinion turned upside down, to the point that I currently have the best consideration of this person, both on personal & professional terms.
I learned a clear lesson: never again rely on a single source of information about people I don't know; and never again let prejudices (even if they seemed founded on first look) to dictate my opinion about anybody. Things are much more complicated than they seem first, and specifically for people who are responsible of teams, personal relationship play an important role, whose understanding requires a broad view which is often lacking.
Anyway, I'm happy because I could eventually pay a much deserved tribute to this person.