This statement is true and is quoted in the book "The essence of the Old testament- A survey". Esther was the divine instrument planted into Xerxes's persian empire who hide her Jewish identity and became a Queen by dismissal of Vashti, the former queen.
Explanation:
Esther disobeyed God's commands by entering into Xerxes harem and became a queen of the Persian empire despite of the anti-Jewish prejudice. She hid her identity and became a part of the divine plan unknowingly which then resulted into invasion of Greece by Xerxes as believed by many scholars.
