"We cannot ignore that we are co-responsible for all around the world," Honduran Cardinal Oscar Rodriguez Maradiaga said. "We cannot be closed down in our own borders and looking only to our own places because all of us are citizens of the same earth and all of us have a common home."

But bishops worry ongoing political strife and ethnic incitement could blight the visit.

The "financial precariousness of most students should not be an obstacle to accessing education," said the national executive of the South African Council of Churches, of which the Southern African Catholic Bishops' Conference is a member.

Pope Francis is expected to stop at the Basilica of Our Lady of Guadalupe in Mexico City, the world's most visited Marian shrine. States mentioned for visits include Michoacan to the west of Mexico City, where outward migration has been strong for generations.

"In principle, it was accepted by the synod," the pope said, according to Eugenio Scalfari, a co-founder and former editor of La Repubblica, an Italian daily. "This is the basic result: the evaluations of the facts are entrusted to confessors, but at the end of the processes—whether quick or slow—all the divorced who ask for it will be admitted."

Pope Francis said that women "must be protected and helped in this dual task: the right to work and the right to motherhood."