Esther had no earthly hope that her truth-telling mission to the king would succeed and she risked her own life to carry it out. Her prayers to God were heartfelt and filled with hope and no small measure of desperation. She had no one else on whom to rely.
Perhaps we're a bit uncomfortable talking about desperate prayer, but I suspect we've all prayed from that place of urgency in our hearts more than once. Esther's prayer can be our model for times like that. With nothing but her trust in God, the truth and her courage, she saved not only a worthy man, but her entire Jewish people.