Marriage is a sacrament, an expression of people's connection to God, by which a man and a woman form with each other, an intimate communion of life and love. Marriage signifies the union of Christ and the Church, and it gives the spouses the grace to love each other, with the love with which Christ loves the Church. The Catholic Church's policy requires couples to undergo a Pre-marriage Education course, in order that they prepare well to live out their Christian marriage.