Upon examination of the book of Esther, we find that only after we have finished reading the entire book can we retroactively appreciate the significance of all the events it relates. Only after we have seen the picture in its entirety, from the third year of King Achashverosh to the twelfth year of his reign, do the many details join together to form a whole mosaic. Only then do we understand the contribution of each and every detail to the final miracle.