This document provides an introduction to a Pre-Cana seminar on marriage. It discusses how marriage is a sacrament in the Catholic faith and how the success of marriages influences the whole Church. It emphasizes that marriage preparation is the responsibility of both clergy and laity. The document then discusses leveling expectations and what participants know about marriage from their upbringings. It defines marriage as a vocation from God to bring new life into the world and provide companionship. The document also discusses different stages of love in marriage, from the honeymoon phase to adjustment, disillusionment, and mature love.