In a message to Antillean youth, Pope Francis said love is the core of the Church's doctrine on the family, which is something every young person is responsible for carrying forward.

To understand what this love means, the pope urged young people to both read and study chapter four of his 2016 post-synodal apostolic exhortation on the family, Amoris Laetitia, which is dedicated to "Love in Marriage."

"I tell you that the core of Amoris Laetitia was chapter four. How to live love. How to live love in the family," he said, and told youth to read and talk about the chapter with each other, because "there is a lot of strength here to continue going forward" and to transform family life.

Love "has its own strength. And love never ends," he said, explaining that if they learn how to truly love as God taught, "you will be transforming something that is for all of eternity."

Pope Francis sent a video message to participants in the youth assembly of the Antilles Bishops Conference, which is taking place in the Archdiocese of Saint-Pierre and Fort-de-France, in Martinique, from July 10-23.

In his message, the pope asked youth whether they were really living as young people, or if they had become "aged youth," because "if you are aged young people you are not going to do anything. You have to be youth who are young, with all the strength that youth has to transform."

He said young people should not be "settled" in life, because being "settled" means one is at a standstill and "things don't go forward."

"You have to un-stall what has been stalled and start to fight," the pope said. "You want to transform, you want to carry forward and you have made your own the directives of the post-synodal exhortation on the family in order to carry the family forward and transform the family of the Caribbean," he said.

In order to promote and carry the family forward, one must understand both the present and the past, Pope Francis said.

"You are preparing to transform something that has been given to you by your elders. You have received the history of yesterday, the traditions of yesterday," he said, adding that people "cannot do anything in the present nor the future if you are not rooted in the past, in your history, in your culture, in your family; if you do not have roots that are well grounded."

To this end, he told youth to spend time with their grandparents and other elderly people, and to take what they learn and "carry it forward."