But she knew "Aunt Esther" was on some heavenly mission. (Para. 15)
Meaning: But she knew "Aunt Esther" was sent to their wedding by God.
mission: n. the action of sending or fact of being sent on some special work or service
His mission is to live up to what his parents expected of him. 他的使命就是实现他父母对他的期望。
His mission to France is successful. 他出使法国很成功。
The enemy believed that the old lady was on a secret mission. 敌人认定那位老太太是在执行一项秘密任务。