Expression.....

How many of us can express ourselves just as we want to. And why is it that some people understand you better than others, even though you use the same words to express yourselves? What is it about people which helps us to distinguish our close friends from our acquaintances. The answer is simple, friends are those who are of our types. But what exactly is our type? Have we not been friends with those who enjoy exactly those things which we don't. Have not the opposites attracted each other? Then what is it that helps us distinguish our close friends from others?