We encounter folks all the time. Some we know, some we don't.
With each encounter one of two things occurs, we either build a bridge between us and the other person, or we build a wall.
We make this choice, whether we realize it or not. That bridge or wall building is enacted through our words, our facial expressions, our level of attentiveness, our degree of listening, our disposition, our emotional state, and our body language.
To be happy, successful, and productive in life, we need to build a LOT more bridges than walls.
In fact, walls are rarely beneficial.