We sit silently and watch the world around us. This has taken a lifetime to learn. It seems only the old are able to sit next to one another and not say anything and still feel content. The young, brash and impatient, must always break the silence. It is a waste, for silence is pure. Silence is holy. It draws people together because only those who are comfortable with each other can sit without speaking. This is the great paradox.
Nicholas SparksThat's a way to increase the realism to the reader, if you want to get technical - you leave it [character] vague and you let the reader fill in the blanks with their imagination.
Nicholas Sparks