After a respected Jew was falsely accused of stealing the royal curtains from the governor's palace, the entire Jewish community of Prague was in mortal danger.
After miraculous intervention, the real culprit confessed to the crime, sparing the Jews of the city
To commemorate this event, "Purim of the Curtains" was instituted to thank G-d for the miraculous salvation.
Link: Purim of the Curtains
Sometimes, it can look like this mitzvah that has come your way is impossible.
But there is no such thing as a mitzvah done alone.
As soon as you muster up the resolve, space, time, and consciousness converge. You nod your consent, and a flood of generations flows through you to do the rest.
Together with you, every Jewish soul, from Abraham and Sarah onward, is swept along in the current.