THE QUICK & EASY WAY TO EFFECTIVE SPEAKING, Dale Carnagie

Each step we take and every action we do in our daily lives is a form of communication. What distinguishes us from the rest of the species is that we can put a linguistic factor to our communication. But when we are unable to express ourselves about basic things like intentions, beliefs or thought process, our whole persona takes a hit and we end up being misunderstood or worse, ignored.