Esther appears in the Bible as a woman of deep piety, faith, courage, patriotism, and caution, combined with resolution; a dutiful daughter to her adopted father, docile and obedient to his counsels, and anxious to share the king’s favour with him for the good of the Jewish people. That she was raised up as an instrument in the hand of God to avert the destruction of the Jewish people, and to afford them protection and forward their wealth and peace in their captivity, is manifest from the Scripture account. (summary by Wikipedia)