"Sister Mary Ignatius Explains It All for You" is a one-act play written by Christopher Durang. The play features a character named Sister Mary Ignatius, a strict and humorous nun who teaches a group of former students about morality and faith. Through her monologues and interactions, she explores themes of religion, guilt, and the complexities of human behavior. The play is known for its satirical take on religious education and the Catholic Church. It combines dark humor with poignant moments, prompting audiences to reflect on their own beliefs and experiences. The character of Sister Mary Ignatius serves as both a guide and a source of comedic tension throughout the performance.