The way we walk, the way we sit, the way we carry ourselves are all indicative of the amount of confidence that we have on the inside.
First impression is the first communication that we have with each other. Although it is non-verbal in most cases; however, we can learn a lot about each other just by silently observing the small details in how straight our back is, how high our head is held, and how self-assuring our overall presence is.