Cardinal Rubén Salazar Gómez of Bogotá tweeted shortly after the referendum that "We are in the hands of the Lord. He is the lord of history, but everyone must assume his own responsibility in the task of building peace."
The peace accord was reached after four years of negotiations in Cuba. The deal was to have incorporated some of FARC's leadership into the government in exchange for their disarmament and renunciation of kidnapping and drug trafficking.
Many Colombians who voted against ratification charged that it was too lenient on the FARC; those members who confessed to crime were to have been given more lenient sentences, and not face time in conventional jails.
Those who voted no on ratifying the deal want to renegotiate the agreement, with fewer concessions made to the FARC.
Since 1964, as many as 260,000 people have been killed and millions displaced in Colombia's civil war.
The conflict has engendered right wing paramilitaries aligned with the government, as well as secondary rebel groups such as the National Liberation Army.
Pope Francis had expressed approval of the peace deal when it was agreed to in August, and his Secretary of State, Cardinal Pietro Parolin, attended the Sept. 26 signing in Cartagena.
Santos has said he accepts the result of the referendum, but will continue to work toward peace with the FARC. And the rebel leader, who is known as Timochenko, has said his guerrilla movement "maintains its will for peace and reiterates its disposition to use only words as the weapon to build toward the future." The existing ceasefire is expected to remain in place.
Fewer than 38 percent of voters participated in the referendum, and the result was divided regionally: voters in outlying provinces were in favor of the peace agreement, while those more inland tended to oppose it.
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