"The Lord will be able to say to us: 'Do you remember? That migrant, who so many wanted to kick out, was me,'" the pope said.

"To the extent that the difficulties seem more insurmountable and the prospects of security and peace seem more unclear, our prayer should be more insistent," he said.

The pope warns against "the recruitment of candidates from other countries solely for the sake of ensuring the survival of a monastery."

Some black men question why police seem to avoid using deadly force on dangerous white suspects but are quick to point a gun at blacks.

The four nuns will be investigated "to determine if there was a canonical crime and help the actions of the civil justice."

The pope's message "can be summarized like so: 'Enough now, enough with this conflict,'" Cardinal Turkson told Vatican Radio on July 20.