Couples who are seeking to marry, even those who have lived together, should value their engagement period as a time to grow in mature love and in profound knowledge of each other, said Pope Francis. The pope urged couples not to rush into marriage. Maturation in love before marriage is a slow process, in which none of the steps should be skipped, Pope Francis told people at his weekly general audience in St. Peter's Square. "The covenant of love between a man and a woman, a covenant for life, cannot be improvised; it cannot be done from one day to the next," he said. There is no such thing as "an express marriage," he added. While it is "beautiful" that people today can choose whom to marry, the "freedom of this bond" cannot be based simply on physical attraction or feelings, he said. Engagement allows a couple to do the profound and "beautiful work of love" -- work that involves a profound "learning" of the other. "Love requires" this work, he said. "The love between a man and a woman is learned and is refined," he said, adding that married love must be understood more as something couples need to work on. Turning two lives into one is also almost a miracle, a miracle of the freedom of the heart, given in faith," he said.