The virtues of humility and charity are crucial for being able to speak to strangers and make new friends / contacts comfortably.
Humility = our ego doesn't get in the way of us making a new friend / contact. Humility prevents self-centeredness that makes us believe we're better than others and also worse than others. If we are afraid of being seen as inferior, we have too much pride and should embrace humility.
Charity = a genuine desire to benefit the lives of the people we meet almost guarantees a positive interaction.