Many famous personalities all over the world have defined reading and writing as the food for thought. Both these attributes have energized the human mind for ages. In fact, all-important revolutions for human kind development have started from the writing on paper only. As can be seen, the thoughts scribbled on paper by famous scientists around the world have brought tremendous changes in our lifestyle. Writing a 500-word essay is a part of this mental exercise. One can express his or her thoughts on any topic or subject, precisely by writing an essay.